As Wim says, you can use MultiSelect.
For me, does not work with SysEx channel, but will work if you choose each channel and use MultiSelect. I used multi select to delete more than one measure in SysEx channel, but if I change the SysEx's END measure to the last I want it to be, it automatically change to maximum as rest of channels have events. Maybe I miss something.
I think Midi Multi Recording is unfinished
![Smiley :)](https://www.psrtutorial.com/forum/Smileys/default/smiley.gif)
It was simple in the first screen when you select Quantize, or Delete, or whatever function down there in screen, tho show a screen to choose "From measure to Measure" and execute function to selected channels
![Wink ;)](https://www.psrtutorial.com/forum/Smileys/default/wink.gif)
Easy
![Smiley :)](https://www.psrtutorial.com/forum/Smileys/default/smiley.gif)
(for us, for them is harder
![Cheesy :D](https://www.psrtutorial.com/forum/Smileys/default/cheesy.gif)
)