What do you call subroutines? Multiple tabs, I guess.
You conveniently forgot to mention the IDE that you are using
In IDE 1.x you can tick a checkbox to search through all tabs.
In IDE 2.x, you can click the magnifying class in the left bar.
The relevant checkbox is in the search window, not in preferences.
And you can switch between tabs simply by clicking on the tab.
I really don't see your problem.
I have had very rare occasion to use more than one tab. I refer to the program text as "the soup" and rely heavily on the search capabilities of my text editor, not gonna start an editor wars, and my own style habits to make that work better.
Whatcha got going on there in 26 tabs? If you would not have to kill us after doing, say a few words about your project!