F7: Execute a Command
Use the F7 key to execute commands. The current screen is not updated, unless you have Set Vis Update On. Type whatever command you want to execute after the ===>. This includes "strings" to find, Qedit Line mode commands such as Open or Justify, shell commands, calculator commands (=5/6), and special Visual commands (e.g., * for Refresh, ? for Help). Then press F7. Qedit reads only the home line and executes the function. To first save your screen changes and then execute, use Enter instead of F7.
See the section "Home Line Commands" for complete details.