Landmark: Controls that aren't in the maniual

This list really improved my experience with the building tools: source

• Press N to switch between two different size progressions for the add brush (and others)

• Press G to lock brushes to a grid of multiples of their current size

• Hold J when using the heal tool to select empty space (similar to how the add tool works)

• Press P when placing a prop to unlock its rotation from the terrain

• Press V to flip (mirror) a pasted selection along the currently selected axis (press tab to cycle axes)

• When adjusting a selection, grab the sides to only adjust the selection on one axis (seriously, this should be obvious, but I've seen tutorials that make it seem like you can only use the corners)

• When adjusting a selection, shift-click to select the face behind the one you're pointing at

• Apply the smooth tool to a selection for more control over what gets smoothed