If WSformat is already running, double-clicking into WSedit activates a specific WSformat functionality. The double-click is context-sensitive, which means the result differs dependendent on the context of the mouse position. But remember that WSformat has to run and the current WS file should be selected in WSformat. If WSformat does not run, you can execute it from WSedit by selecting the menu item "File - Save+WSformat" or pressing ^KF.
Double-clicking into normal text opens a second WSedit window with the corresponding formatted or unformatted file, and the cursor jumps to the same location, which means you can easily switch between the unformatted (WS) and the formatted (FMT) file.
Double-clicking into a font dot command activates a small font sample window. Double-clicking again activates the WSformat dot command window, and a third double-click activates the font sample window again and so on.
Double-clicking into a dot command activates the WSformat dot command window, with the current dot command selected.
Double-clicking into the filename parameter of dot command ".BM" (Bitmap/Graphics dot command) opens the WSformat graphics dialog and shows you the current graphic file. Another way to have access to the WSformat graphics dialog is to select Edit - Paste in WSedit and the clipboard contains a graphic and not text.
Double-clicking into the filename parameter of dot command ".FI" (File) opens another WSedit instance containing the text file behind the ".FI" command.
Some of the mentioned WSformat functions do also work in the other direction (from
WSformat to WSedit). For example, if you run the graphics dialog by double-clicking
to the ".BM" parameter in WSedit and you change the filename of the bitmap in the
graphics dialog, the ".BM" line in WSedit gets updated automatically.