Layout graphs without borders / black lines

After a long time using Igor I've only just realized that Layouts can be useful for gridding multiple plots. (And for acting as a data folder for graphs, it seems)

But can't I somehow remove the ugly black border from each subplot in the layout?
Solution: Double click the graph and set Frame to "None".

Afterwards, you can capture this as a preference.

(I haven't managed to make it the preference for an indefinite number of subsequent graphs, but maybe that's just how preferences work.)
Comment:

If it seems to be the case that the above solution isn't working, go to the original graph and check that frameStyle=0 (Modifygraph frameStyle=0)