Selection tools and Mask Editor
The selection tools are powerful tools to apply masks to video effects. This allows you to create limits, opacities and animations on both layers and video effects/transitions. You can have geometric masks and brush masks.
You have 8 geometric tools and 1 bitmap brush tool:
Rectangle selection, to select rectangular areas
Ellipse selection, to select elliptic areas
Free lasso, to select an arbitrary shape
Polygon lasso, for a polygon selection
Edge-detecting lasso, same as the polygon lasso but with edge detection algorithm to select objects
Magic wand, to automatically detect objects
Magic Grab, to automatically detect objects on a selection rectangle
Geonetry brush, to brush over areas to add or remove rectangle or ellipse geometries
Brush mask, to paint over areas to select or unselect
These tools work in 3 ways:
Use them before any effect or layer is selected. They will be applied to the next inserted effect
Use them after you have selected a layer. They will be applied as layer masks
Use them after you have selected an effect. They will be applied to the effect
The geometric masks can also be transformed (widened, translated, rotated, scaled, outlined).
The brush tool can help you to create a bitmap opacity brush. Selecting this tool will cancel all geometric masks and present you a drawing interface in which you have drawing tools (rectangle, circle, fill) along with a radius, strength and opacity selector. The more close the opacity is to 1.0 (full), the more the brushed area masks the layer.