Schematic text sourced from Capture is searchable. This is known to be true for at least Capture Ver 7.x thru 10.x. The text can be sustained because it is not precision artwork, like gerbers are. Again, the text search "problem" is pcb/asm docs sourced from the layout source program. It all prints to image. For pcb/asm -> pdf, you can't find where "R132" is by doing cntl-f. I found a strange workaround for asm-pdf drawings. I don't know if the solution is worth the work.