At work, many netizens use Beyond Compare to compare files, and the accuracy is very high. A single character or space difference can be marked out. Too much text content often dazzles everyone. At this time, unimportant text differences need to be ignored. Please take a look at the method of automatically ignoring unimportant differences when comparing Beyond Compare shared by the editor below. I hope it can help everyone.
New syntax elements can be defined and marked as unimportant in very simple steps.
In the menu bar [Tools]-[File Format]. Make new file formats, or edit existing ones.

Go to the Grammar tab. You can add a new element and give it a name. It is important to change the content in "New Elements" because all new elements for all file formats will be handled similarly via session settings. If you compare a Java file to a C++ file and mark Strings as unimportant in the syntax, both the Java strings and the C++ strings will be marked as unimportant.

Define element type:
· Basic: Matches a specific portion of text. Can be expressed as a regular expression.
· Boundary: Match the starting point of the text and the end point of the text. Can stop at end of line.
· List: Basic matching list. Can be used in place of a separate Basic element.
· Column: A portion of text defined at the starting position of the row and the ending position of the number.
· Line: Matches the starting point or first line of text and ends with a user-defined number of lines.

Open your file pair in a text comparison session. Navigate to Session | Session Settings | Importance tab. It is important to check the items. Items that are not checked are not important. Uncheck the name of the new element (e.g. "VarString").
If you want the importance setting to affect all comparisons instead of just the current comparison, change the drop-down list at the bottom of the dialog box from For this view only to Update session defaults before clicking OK.
Differences that match element definitions will now be treated as unimportant differences.
The above explains how to automatically ignore unimportant differences when comparing Beyond Compare. I hope friends in need can learn from it.