Rows can be selected in ParamQuery Grid either by user action or programmatically.

In UI, rows can be selected by click of mouse.

selectionModel.toggle

1. rows can be deselected by simple click of mouse when it's true.
2. rows can be deselected by Ctrl click when it's false.

All rows can be selected / deselected using Ctrl - A or Cmd - A (Mac).

Contiguous rows can be selected with Shift key.

Non-contiguous rows can be selected/deselected with Ctrl / Cmd key.

Selections can be copied and cut with Ctrl - C and Ctrl - X respectively.