A double-click on a creation tool in the Tools bar makes what it draws, as in After Effects: a text layer from the Type tools; from the shape tools a shape that fills the comp - into the selected shape layer's Contents, as a mask on the selected layer (or when Tool Creates Mask is on), or as a new shape layer when neither applies. The shape geometry defaults now match AE: the Rounded Rectangle tool's Roundness is a fixed 20 instead of growing with the drawn size, and the Polygon tool draws five points.
Egon 5000