The Split tool () divides overlapping entities along their intersecting edges, separating each solid entity.
In SketchUp for iPad, the Split tool does not have any optional tool modes.
iPad Input Methods for the Split Tool
The Split tool can be used with any of SketchUp for iPad's input methods in either Just Draw or Click-Move-Click mode.
Click-Move-Click Mode or Just Draw Mode
Mouse or Trackpad - Select the Split tool and click your first solid. Click another solid entity that intersects with your first selection. Repeat for each additional intersecting solid as needed.
Pencil or Multitouch - Select the Split tool and click your first solid. Tap another solid entity that intersects with your first selection. Repeat for each additional intersecting solid as needed.
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For more information on how to use the Split tool in your models, see Splitting Solids in Modeling Complex 3D Shapes with the Solid Tools.