Grid Lab

V3.80 · Made by Bas Arkes

Canvas mode

Canvas size × Width (px) Height (px)

Reference Origin

Quick tips

Grid Lab Tips

Navigation

Canvas movement

Space or Middle mouse pans the canvas and keeps your selection.
C fits the full project back into view.
Use the bottom floating bar for zoom, centre view, undo, and redo.

Selection

Select and move layers

Shift click or Ctrl / Cmd click adds or removes layers from the current selection.
While dragging, hold Shift to lock movement to X or Y.
Use the arrow keys to nudge selected layers by 1 px, or Shift + arrow keys for 10 px.

Editing

Copy, paste, resize, delete

Ctrl / Cmd + C copies the current selection.
Ctrl / Cmd + V pastes one or multiple selected layers with an offset.
Ctrl / Cmd + Z undo, Ctrl / Cmd + Y redo.
Delete or Backspace removes the selected layers.
Hold Shift on a corner handle to keep proportions.

Snapping

Snap control

Normal dragging snaps to helpful guides and nearby positions.
Hold Alt while dragging to temporarily disable snapping.
Grouped surfaces share guide and coordinate behaviour from their group leader.

Layers

Layer list, visibility, groups

Drag layers in the Layers panel to change the stacking order.
Hide a layer by clicking the coloured rectangle next to the layer name.
Select multiple surfaces and use Group Surfaces to make them share guides, coordinates, and local reference behaviour.

Grid & coordinates

Reference, origin, and coordinate colours

Reference switches between Global and Local alignment of the grid coordinates. Global sets the reference point to the canvas; Local sets the reference point per surface.
Origin lets you start the pattern from top left, top right, centre, bottom left, or bottom right. Centre keeps the signed centre system. Corner origins count outward as a1, a2, a3 / b1, b2, b3; grouped surfaces extending behind the chosen corner continue with negative column numbers and capital row letters.
Grid size controls the cell size, and Coordinate size changes the text size independently.
Alt + click the Grid Coordinates toggle button to switch between the normal checker look and the shifted RGB + CMY colour mode.
The surface Opacity % also affects RGB + CMY coordinate-cell fills.

Layers

Detected Overlaps

Horizontal overlap px

Vertical overlap px

Type overlap values and press Enter to apply the exact shared pixels.

Projection Brightness

Projector lumens

Brightness efficiency %

Ambient light (lux)

Selected area

Projected brightness

Total surface light

Contrast estimate

Select one metric surface to estimate lux. This is a practical first estimate, not a calibrated photometric simulation.

View Layer State

Project background grid

Surface color fills

Per-surface grids

Grid coordinates

Border coordinates

Grid circles

Grid diagonals ↘ ↙

Surface labels

Colourgrade bar

Automatic overlap bands

Snap surfaces

Show snap guides

Zoom 100% 3840 × 2160 0 surfaces 0 overlaps

Quick Ratio:

Canvas

Surfaces

Coordinates

Guides

Snap

Inspector

Select a layer to edit it.

Multiple layers selected. Move this temporary selection on the canvas, or use Group selected in Layers to share guides and coordinates.

Selected

Total size

Group X

Group Y

Number fields accept math, for example 3840/2 or 100+50.

Name

Text

Text size

Text colour

Image layer

Width (px)

Height (px)

Width (mm)

Height (mm)

Origin X

Origin Y

Rotation °

Transform Origin

Grid size (px)

Coordinate size (px)

Grid size (mm)

Color ID

Shape

Line width (px)

Line colour

Fill opacity %

Line opacity %

Line width ranges from 0 to 10 px in 1 px steps. 0 px hides the line. Fill and line opacity are separate.

Colour Border

Colour Grid

Colour Background

Opacity %

Show local grid

Show label

Colour

Hue

HEX

RGB

R

G

B

HSV

H

S %

V %

#FFCB05 Click to select · Esc to cancel

Export Surfaces

Select surfaces and choose the export style.

0 selected

Individual PNGs Exports every checked surface as its own file.

One combined PNG Exports all checked surfaces together as one cropped image.

PNG

The export uses the Surface export mode dropdown from the Files section.