https://help.salesforce.com/s/articleView?id=sf.code_add_users_debug_log.htm&language=en_US&type=5
Search all of Salesforce Help. To activate debug logging for users, Apex classes, and Apex triggers, configure trace flags and debug levels in the Developer Console or in Setup.

https://salesforce.stackexchange.com/questions/287324/debugging-apex-triggers
There are several different approaches you can use to test your trigger and attempt to isolate the bugs. Manual Testing. Manual testing boils down to performing record creation or update steps within the user interface (or via Anonymous Apex) that cause your trigger to run and yield you some information, whether that information comes via an exception message, correct or incorrect operation

https://www.youtube.com/watch?v=Rk_6ZcVl8ok
Straight to the point Salesforce video on How to use Debug Logs in Salesforce and Apex Triggers #salesforce #salesforceknowledge #salesforcedevelopers

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_debugging_debug_log.htm
If logging is enabled when classes or triggers execute, logs are generated at the time of execution. To view a debug log from Setup, enter Debug Logs in the Quick Find box, then select Debug Logs. Then click View next to the debug log that you want to examine. Click Download to download the log as an XML file.

https://help.salesforce.com/s/articleView?id=sf.code_debug_log.htm&language=en_US&type=5
Use the Developer Console's Query Editor to find and delete the logs using Tooling API. Debug Log Filtering for Apex Classes and Apex Triggers Debug log filtering provides a mechanism for fine-tuning the log verbosity at the trigger and class level.

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_debugging_system_log_console.htm
It shows the source of an operation, what triggered the operation, and what occurred next. Use this tool to inspect debug logs that include database events, Apex processing, workflow, and validation logic. To learn more about working with logs in the Developer Console, see Log Inspector in the Salesforce online help.

https://salesforce.stackexchange.com/questions/36582/how-do-i-start-to-debug-my-own-apex-code
Save the code. 2. Go to Monitor -> Logs -> Debug Logs 3. Click the New button in Monitored Users. Find your user and select it and save. 4. Trigger the trigger somehow (if it fires on a field update, create a test record and update the field and click Save). 5.

https://help.salesforce.com/s/articleView?id=sf.debugging_your_code.htm&language=en_US&type=5
The Log Inspector is a context-sensitive execution viewer in the Developer Console. It shows the source of an operation, what triggered the operation, and what occurred next. Use this tool to inspect debug logs that include database events, Apex processing, workflow, and validation logic. Use Custom Perspectives in the Log Inspector

https://trailhead.salesforce.com/content/learn/modules/apex_triggers/apex_triggers_intro
Trigger Example. This simple trigger fires before you insert an account and writes a message to the debug log. In the Developer Console, click File | New | Apex Trigger . Enter HelloWorldTrigger for the trigger name, and then select Account for the sObject. Click Submit . Replace the default code with the following.

https://help.salesforce.com/s/articleView?id=sf.code_debug_log_classes.htm&language=en_US&type=5
Setting Debug Log Filters for Apex Classes and Triggers. This is especially helpful when debugging Apex logic. For example, to evaluate the output of a complex process, you can raise the log verbosity for a given class while turning off logging for other classes or triggers within a single request. When you override the debug log levels for a

https://trailhead.salesforce.com/content/learn/modules/developer_console/developer_console_logs
After execution, double-click the log that appears in the Logs tab. Let's try the first method. Select Debug | Open Execute Anonymous Window. The Enter Apex Code window displays the last code that you entered for execution. If it's different from the following code, delete it and paste the following code.

https://www.saasguru.co/debug-logs-in-salesforce/
2. Apex Debug Logs: Apex Debug Logs are focused on the custom Apex code within Salesforce. This includes triggers, classes, and other custom codes. Use Case: When developers need to understand the flow of their code, validate the execution of specific logic, or identify issues, Apex Debug Logs come into play. Details: These logs capture:

https://help.salesforce.com/s/articleView?id=000392579&language=en_US&type=1
Recreate the issue. 1. Perform the action that you are troubleshooting. a.) Record triggered flow: create, update or delete a record that will trigger the flow. b.) Screen flow: launch the screen flow like normal. c.) Trigger: create, update or delete a record based on the apex trigger. 2.

https://developer.salesforce.com/tools/vscode/en/apex/replay-debugger
Click the log that you want to replay. The log downloads and opens in VS Code. Run SFDX: Launch Apex Replay Debugger with Current File. When you've stepped through all the logged events, the debugging session ends. If you want to start again at the beginning of the log, run SFDX: Launch Apex Replay Debugger with Last Log File.

https://help.salesforce.com/s/articleView?id=sf.code_setting_debug_log_levels.htm&language=en_US&type=5
USER_DEBUG trace flags cause logging of an individual user's activities. CLASS_TRACING trace flags override logging levels for Apex classes and triggers, but don't generate logs. When using the Developer Console or monitoring a debug log, you can specify the level of information that gets included in the log.

https://developer.salesforce.com/docs/atlas.en-us.sfdx_dev.meta/sfdx_dev/sfdx_dev_develop_view_apex_debug_logs.htm
In Salesforce Extensions for VS Code, prepare the org to generate logs and configure the debugger. For Replay Debugger, run SFDX: Turn on Apex Debug Log for Replay Debugger. Create a launch configuration file for Replay Debugger or Interactive Debugger. After you run the tests, get a list of the debug logs. View a debug log by passing its ID to

https://trailhead.salesforce.com/content/learn/modules/apex_basics_dotnet/debugging_diagnostics
Position your cursor over line 10 in the left margin and click once. A red dot appears next to the line number. Double-click the latest entry in the Logs panel to open the debug log. Select Debug > Open Execute Anonymous Window . Delete the existing code, and insert the following snippet:

https://bluecanvas.io/blog/debugging-apex-salesforce-debug-log-checkpoints
Trace Flags in Salesforce allow you to specify which user's activity should be logged in the Debug Logs. To set up a Trace Flag, go to Setup and search for "Debug Logs." Click on "New Trace Flag" and specify the user for whom you want to capture logs. Additionally, you need to set the Debug Level, which determines the logging granularity.

https://salesforce.stackexchange.com/questions/115963/debug-logs-doesnt-appear-on-apex-trigger
USER_DEBUG trace flags cause logging of an individual user's activities. CLASS_TRACING trace flags override logging levels for Apex classes and triggers, but don't generate logs. That last part that I've made bold is the important part. A class/trigger LogType that the "Class and Trigger Trace Overrides" section creates won't cause the

https://salesforce.stackexchange.com/questions/173044/how-do-i-see-debug-logs-for-platform-event-triggers-in-salesforce
As per Enterprise Messaging Platform in the Summer '17 release notes and First Impressions with Platform Events and the Salesforce Enterprise Messaging Platform I created a simple Platform Event with the API name TestEvent__e and a corresponding trigger.. trigger TestEventTrigger on TestEvent__e (after insert) { System.debug('Event Log'); for (TestEvent__e event : Trigger.New) { System.debug

https://salesforce.stackexchange.com/questions/422864/apex-trigger-not-firing-debug-logs-empty
Make sure that the debug level is set to Finest for Apex Code to capture detailed logs for triggers. Open the Developer Console to monitor real-time logs and check if the trigger execution is being captured there. Check this helpful documentation. One does not need debug log for apex set to finest for trigger debug.

https://salesforce.stackexchange.com/questions/256774/debug-logs-on-triggers
2. To see trigger executions, I set my debug as: Traced Entity Type: User. Traced Entity Name: My User. Then if you are the one executing the DML operation which fires the trigger you will be able to see each trigger that is executed (As long as your debug level has apex code as info/finest). Share.

https://salesforce.stackexchange.com/questions/214380/how-are-we-supposed-to-use-debug-logs-for-a-specific-apex-class-only
I'm trying to capture the logs for a specific class for a user with a lot of transactions (hundreds in any given minute). For example, the user will have 100 transactions done in a minute that will show up if I turn on debug logs for it; however, I am only interested in seeing the logs for 2 of those transactions that are related to a specific class (e.g., Accounts.cls).

https://help.salesforce.com/s/articleView?id=flow_ref_elements_oci_actions_transfer_reservation.htm&language=en_US&type=5
Choose Which Salesforce Flow Feature to Use. Equivalent Features in Flows and Workflow Rules. Browser Requirements. ... Trigger an Evaluation of Orchestration Stage and Step Conditions. ... Add a Comments Column to the Orchestration Run Log. Reassign a Work Item.

https://help.salesforce.com/s/articleView?id=sf.glossary.htm&type=5
Apex code that doesn't get stored in Salesforce, but that can be compiled and executed by using the ExecuteAnonymousResult() API call, or the equivalent in the AJAX Toolkit. Answers Community members can then vote on the helpfulness of each reply, and the person who asked the question can mark one reply as the best answer.