You can select most commands in any mode in PC-DMIS.
In Summary mode, click on a collapsed group command to select the entire command block. PC-DMIS also selects all of the data items associated with the commands present in the group. For details see "Selecting Commands in Summary Mode".
In Command mode or DMIS mode, click the start of the command, hold down the mouse, and then drag it until you highlight the entire command.
The Edit | Select All menu option selects the entire window's contents for editing purposes.
As you select feature commands, PC-DMIS highlights those features in the Graphic Display window in a light blue color. Also, in Command mode, this happens if you click anywhere in a feature command. To change the highlight color, see "Highlight" under "Changing Screen Colors" in the "Editing the CAD Display" chapter. Auto Plane features also highlight the entire surface.