Solid Edge, the symbols of relationship

Hello

I work with Solid Edge V19.
In the sketches .par or .psm; I can no longer select the relationship symbols to modify them.
In the .dft files, I can no longer also select the cut lines.
Maybe it's a box checked (or unchecked) during an unfortunate manipulation.
Thank you for your answers.

It's been a while since I've handled OS, but on SolidWork, there's now a selection filter system that activates, among other things, via a key combination.

Perhaps there is something analogous in SE: see page 36 of this document (http://support.industrysoftware.automation.siemens.com/training/se/106/fr_FR/fr_FR/selfPacedExt/pdf/spse01501_ui_basics.pdf)

Thank you for trying to help me, but it was a completely independent keyboard problem from SE. It just goes to show that sometimes you have to catch your breath before crying wolf...

Thanks to stefbeno