You can select everything on a single layer to move, rotate, scale, or adjust it all at once.
- Open the Layers menu from the toolbar.
- Tap the layer you want to select. It will become highlighted.
- Tap the selected layer again to open the layer options popup.
- Tap the selection arrow icon on the left side of the popup.
The entire content of the layer is now selected. You can use the Selection menu options to make your adjustments.