Is there a way to switch off the automatic play function that happens when you hold down the left or right arrow keys to move through the timeline?

I can't find anything in the preferences.

Yes , Just use Edit–>Hotkeys.. window !!! 8)

I don't want to change the shortcut keys.

When using the right and left arrow keys to step throught the timeline, it automatcaly starts to play once you hold down the arrow key. This is what I want to switch off. Stepping through the timeline should stop as soon as I let go of the arrow key.

Check your OS settings:
https://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=37342 [sidefx.com]

Thanks pezetko. Much appreciate it.