A grid can fill one layer, like a card, a screen or a building in your shot, instead of the whole comp.
Fit the grid to a layer
- Select the layer in the timeline. Select several to fit the grid around all of them.
- Cmd-click Grid (Ctrl-click on Windows).
The grid fills the layer's bounds. The preview draws them as a dashed frame inside the comp.
The frame's own edges get guides. Margins and gutter measure from the frame, and percent values are a percent of the frame.
After Effects guides always run across the whole comp, so the lines cross the rest of the frame too. What fits the layer is where they sit.
How Griddy measures the layer
Griddy uses what you see of the layer at the playhead, in comp space. Rotation, scale and parents all count. Cameras and lights have no edges and are skipped.
The frame is fixed when you click. Changing the columns, rows, margins or gutter afterwards keeps the same frame, even if the layer moves later. Cmd-click Grid again to fit the grid to the layer where it is now.
Back to the whole comp
Click Grid to take the grid off, then click it again. A plain click always puts the grid on the whole comp.
When it doesn’t work
- No layers on the tile means nothing is selected, the selection is only cameras and lights, or the selected layers have nothing visible at the playhead.
- No room means the grid’s margins and gutter don’t fit inside the layer. Griddy leaves the comp as it was. Lower the margins or gutter, or use fewer columns and rows, then try again.