I've complained a lot about gnome removing user configurability. And I'm going to keep doing that, have no fear. However this post is about how to overcome some of their decisions. A perfect example is when gnome decided you could have however many workspaces you wanted, but you're only allowed to configure hotkeys for switching to 4 of them. And moving applications to 4 of the workspaces. Really now?

Fortunately you can use dconf to overcome this. Start by going to Settings -> Multitasking and add as many fixed workspaces as you want, six in my case. Next go to Settings -> Keyboard -> View and Customize Shortcuts. Search for "workspace" then set the first four entries for "Move window to workspace 1..4" and "Switch to workspace 1..4". I use alt+number to switch to the workspace and alt+shift+number to move a window to a specific workspace. Now open a terminal and do the following. Workspace 4 is already set of course but I included it so that you'd get the hotkey combo you've configured and can easily replicate it.

dconf read /org/gnome/desktop/wm/keybindings/switch-to-workspace-4
['<Alt>4']
dconf write /org/gnome/desktop/wm/keybindings/switch-to-workspace-5 "['<Alt>5']"
dconf write /org/gnome/desktop/wm/keybindings/switch-to-workspace-6 "['<Alt>6']"

dconf read /org/gnome/desktop/wm/keybindings/move-to-workspace-4
['<Shift><Alt>4']
dconf write /org/gnome/desktop/wm/keybindings/move-to-workspace-5 "['<Shift><Alt>5']"
dconf read /org/gnome/desktop/wm/keybindings/move-to-workspace-6 "['<Shift><Alt>6']"