Use this command to convert all of the spaces in a file to tabs. This uses the Tab Settings to determine how the tab character/tab stop is to be interpreted.
The conversion is performed such that the formatting will remain the same. This will mean that where there are insufficient spaces to replace with a TAB character and retain the same formatting the spaces will be left in place.
If a portion of the file is selected/highlighted only the selected portion is converted, otherwise the complete file is converted.
If you wish to convert only the space at the beginning of a line use the Spaces to Tabs (Leading) command.
To convert tabs to spaces use the Tabs to Spaces command.