After selecting an element for a Mesh object, you can apply any
transformation to change the structure of that object. It could be a scale
or move transformation, which is the starting point for many 3D modeling
projects (Figure 2.15).
Figure 2.15 - Object transformation
The two most used work modes in Blender are the Object and Edit. For
that reason, you will find a dedicated shortcut that allows us to quickly
swap between those two modes. You can press the TAB key with one or
more objects selected, and it will either go to Object or Edit Modes.
If you are in Object Mode, the shortcut swap to Edit Mode, and if you are
in Edit Mode, the TAB key will make you go back to Object Mode.
Info: You can use the same shortcuts to select multiple elements. For
instance, you can hold the SHIFT key to add multiple elements (vertices,
edges, or faces) to the selection.