Select[list, crit] picks out all elements e_i of list for which crit[e_i] is True. Select[list, crit, n] picks out the first n elements for which crit[e_i] is True.

Selectable is an option for displayed objects, cells, and notebooks that specifies whether their contents can be selected interactively using the front end.

WindowClickSelect is a notebook option that specifies whether the window for the notebook should become selected if you click it.

Select All selects all cells in the current notebook.

"SelectAll" is a front end token that selects all the cells in the current notebook.

These "How tos" give step-by-step instructions for common tasks related to selecting and typing in notebooks.

"SelectTerminalWindow" is a front end token that opens a terminal window to the machine specified by a kernel name.

"Manipulating Elements of Lists" shows how you can pick out elements of lists based on their positions. Often, however, you will need to select elements based not on where ...

While some cells in Mathematica are not visible, they can still be selected for editing and modification. Selecting cells without visible cell brackets works just like ...

NotebookSelection[] represents the current selection in the current evaluation notebook in the front end. NotebookSelection[nb] represents the current selection associated ...