Turn on Options|Lines Numbers to have EditPad display a number before each line in the left margin.
In File Type Editor Options, you can indicate if you want visible lines or physical lines to be numbered. This setting cannot be changed in the Options menu.
Note that "lines numbers" is a file type specific setting in EditPad. If you change the setting through the Options menu or the toolbar, it is applied to the active file only. If you create a new file or open an existing one, the setting made in File Type Editor Options for the type of file you are creating or opening, will be used. Also, when you use File|Save As, and you save the file with a new extension, then the setting for the current file will change into what you specified in File Types Preferences for the file type that corresponds with the file's new extension.
Configure File Types