In the old IDE we had that Defines tab in project properties where you could set one define per line:
That was pretty handy right?
So in the new IDE that is found on the “Compiling” tab with the […] button for editing:
Where you get them in a list with Add/Edit/Remove buttons like so:
Which is kind of boring when you want to edit a bunch yeah?!
Hint: You can just edit them right there in the entry control:
If you have a bunch to add or change then just cut the lot to a text editor, make your changes and paste them back. Yay!
<13,10> separator you just need