It deepend on what cfg you'r using, i dont know where the offset is, but i normally just drag it from Customice/ Command to the copy toolbar as i like to have it there.
The Modify toolbar you normally should find in Customice/ Toolbars, just check it and then drag it to where you want it.
V18, V19, V20, V21, 2015/ 16/ 17 Pro. Platinum
Deluxe V20, V21, 2015/ 16/ 17
Windows 10 Home Premium 64 bit, 32 GB
NVIDIA Geforce GTX 780m, 1 GB