You can create a master parameter dial that controls any combination of dials you need via the parameters pallet.

At the top of the parameters pallet look for the arrow pointing to the right of the screen. Click it and a menu will drop down. Choose 'Create new master parameter'. Give it a name.

It should show up in the Morphs list of your figure. Then click the arrow to the right of it. Choose Edit Dependencies. The dependencies editor window will pop up.

There's a button at the top of the menu that says Start Teaching, with a dial next to it and a value of 0. Click that button, then find the morph(s) you want to control and put a value in them, any value at all will add that parameter to the list of dependencies. Set the value of the master dial to 1.0 (or whatever value you want that makes sense for you, I generally always use 1.0 for 100% and 0.0 for 0%), then set the value of the morph to whatever value you need it to be when the master dial is at 100%. Then reverse it, set master dial back to 0 and your morph dials to zero. Then click Stop Teaching. Your master parameter should now control the morphs and scaling that you need.

You can generate a new injection morph from this dial to inject into any other figure that has those morphs.

Any parameter in the parameters pallet can become a master parameter.