To change the size of the crosshair in AutoCAD, do the following steps:
- Right-click anywhere in the model space and select options.
- Open the Display Tab.
- In the bottom right there is a Crosshair size setting. Change it to what you would like.
Personally as I explain in my video, I like making the crosshair size 100, the maximum size it can be. This helps me when trying to select multiple object in the model space.