# Limits & Constraints

> The ceilings worth knowing before you design around them.

Glider documentation · Reference · Web page: https://cgglider.com/docs/limits/

Sections of this page: [Known limits](https://cgglider.com/docs/limits.md) · [By design](https://cgglider.com/docs/limits/design.md)

Hard numbers.

| Area | Limit |
| --- | --- |
| Workspace | Two panes — side by side or stacked. |
| Scene size | The page's frame for a graphic scene — 1920 × 1080 by default; 1280 × 720, 3840 × 2160 or a custom even size from 640 to 3840 per side (Settings › Show › Format). Control panels are infinite. |
| Zoom | 50–200 % on a scene, 10–300 % on a control panel. |
| Group nesting | 4 deep, in the editor and on PSD import. |
| PSD import | 300 layers, 1 GB file. |
| Sheets | 5000 rows × 256 columns. |
| Snap targets | 60 nearest elements per drag. |
| Undo history | 100 steps. |
| Logger | 200 entries; server function logs expire after 24 hours. |
| Checkpoints | 25 per page. |
| Agent runs | 2000 steps per run, kept 7 days. |
| Reaction cascades | 256 actions per turn, 512 per rolling second. |
| Clip chains | Depth 16. |
| Uploads | Per-type ceilings, 1 GB absolute. |