6 Toolbar for the Lua programming window Symbol Name Hotkey Description Pause program debugging - Pause the current Lua program in execution. When pausing, a yellow arrow points to the the next instruction to be executed. Run line by line F10 Run line by line. If the instruction to be executed is a function, this instruction is executed completely. In the example below, if you execute [Run line by line] at line 24, the program jumps to line 26.