How to increase the size of the camera and point clouds - 3d tracking

I made 3D tracking, and imported it in Blender through maya.

Now I have a camera and a point cloud, which are very small. How to increase their size?

I tried parenting to empty (then scale this empty), but in this case, the camera immediately turns in the wrong direction.

How to change the scale of the camera and point cloud, without re-importing them again?
(I spent a long time with this scene and it is the only successful version of the 3D tracking, I am afraid that I will can not restore it, if I start from the beginning).

If you just want to make the camera object bigger you can select the camera and in its properties increase the display size value


Richard Marklew, it only changes the appearance of the camera icon, as I understand it. And I need to scale it size, because the physics in a blender does not work well with very small objects