The Line Change Indicator branch under Configuration - Editor Display has the following options:
Width of Line Change Indicator in pixels
This text field may be used to specify the width of the Line Change Indicator in pixels. Values may be set between 1 and 9.
Enable line change indicator (LCI)
If this option is selected, modified lines will be indicated with a special colored shading between the line numbers and the first character on the line. The colors used to indicate saved and unsaved changes to a file within an editing session are configured under the Editor tab in the Manage Themes dialog. If the undo buffer is cleared during an editing session, the line change indicators would be reset as well.
If a file is opened that exceeds the threshold specified for using temporary files under the Temporary Files branch in the File Handling section of configuration, and the option is set to open without a temporary file in this case, the line change indicator will not be displayed.
This setting is a global toggle for the function. If users wish to toggle this option on/off on a file-by-file basis, this may be done using the option in the View tab. If files are open for editing when this option is changed, they would need to be reloaded or the Line Change Indicator setting would need to be toggled in the View tab to affect these files.
Hide LCI by default on file open
This option can only be selected if the option above is selected. When this is selected and changes are made to a file, the changes are tracked, but the LCI is not immediately shown for modified lines. If the user wishes to see which lines have been modified, he can click on the Line change indicator button in the View tab to toggle visibility of the LCI.