You have to do it in LUA code:
myStrings = {"Hello World", "Here comes the sun", "How do you do?", "and so on" }
In your Message box you select "User Expression" from the list and enter myStrings[1] for "Hello World"
After quite some time, I'm back to my cartridge...
For now, writing the strings in Lua code worked fine, but wouldn't this be an interesting feature to have ? I mean, have an editable string table that is transposed when compiled into code by urwigo ?
Besides that, I would like to report two user interface annoying things :
1. there is no "close" button for the main tabbed group; when you get a lot of windows open, one needs way to many clicks to right-click the tab, then choose "close", then select another, etc.
2. you need two clicks now to set focus to the right input on the right-side properties panel; for instance, you have a Lua user expression box; you select it, the properties show the Lua editor; but if you click inside the editor, the first click focuses the panel, then the second focuses the editor, and the caret appears. Apparently this happens for any input, not just the code editor.
I'm not sure those problems existed before, but I did not notice them until the last update.
Otherwise, if it needs to be said again, this is a great tool