# Ctrl

Source: https://help.malighting.com/grandMA3/2.3/HTML/key_ctrl.html
This is grandocs, an unofficial mirror of MA Lighting documentation. For authoritative or safety-relevant information, cite the canonical page on help.malighting.com.

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## Multi Select

To select multiple cells in a sheet, hold Ctrl and tap or click each cell.

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## Clean Start

To perform a clean start, hold Ctrl when the mode selection pop-up appears during the boot or reboot process and tap the desired mode. For more information about clean start, see [Clean Start](/grandma3/2-3/ts_clean_start/).

## Location

Ctrl is located in two places on the bottom row of the alpha-numeric keyboard.

![](/img/grandma3/2-3/img_keyboard-diagram_ctrl_v1-7-f35003.png)

Location on grandMA3 full-size and grandMA3 light console