This tool gives you a mixer to control all your send levels:
Menu : Tools:Ledger`s Scripts:Send Mixer
Shortcut : Global:Tools: Send Mixer
To use:
1) Choose target send track from switcher on top left.
2) Move sliders and send devices are automatically added if not already present
3) Navigate tracks by pressing the blank square buttons (left of `S` buttons). They light up green when a track is selected
4) solo tracks with the `S` buttons