Layers, canvases, guides & alignment
Grids, guides & rulers
Clean print work lives and dies by consistent margins, columns and safe areas. Popcorn Editor gives you a full set of alignment aids — rulers, pull-out guides, a modular grid, column and row layout guides, snapping, and a dedicated bleed guide — so every element lands exactly where it should.
The View menu toggles
Almost everything about what you see and what you snap to lives in one place: the View menu. Each item is a checkable toggle, so you can turn on only the aids you need:
| Toggle | What it does |
|---|---|
| Snap to objects | Elements snap to the edges and centers of other objects. |
| Show bleed | Draws the red bleed guide outside the trim edge. |
| Show grid | Displays the per-canvas modular grid. |
| Show layout guides | Displays your column / row / grid layout guides. |
| Snap to grid | Snaps objects to the grid. |
| Snap to layout guides | Snaps objects to layout-guide tracks. |
Because visibility and snapping are separate toggles, you can show a grid purely as a visual reference without it tugging your objects around — or snap to it while keeping the lines hidden.
Rulers
Rulers run along the top and left of the workspace, labeled in the active canvas's units. They give you a constant readout of position and size as you drag.
To change the ruler unit, right-click the ruler and pick from the Ruler units menu — you can switch between Pixels (px), Millimeters (mm), Centimeters (cm), Inches (in) and Points (pt). Print work usually wants millimeters or inches; screen work wants pixels.
Tip: the ruler unit is how you set measurement units for the whole document — there is no separate units menu. See Canvas size, units & presets for how units relate to resolution.
Pull-out guides
Need a one-off alignment line? Drag from either ruler onto the canvas to create a guide. Drop it where you want it, then drag it again any time to reposition. To remove one, select it and use Delete guide.
Pull-out guides snap to the pixel grid as you place them, so they land on whole values rather than fractional positions — handy for lining up a header band or a fold line by hand.
The grid
For a repeating modular grid, open the canvas inspector and find the Grid & Layout section. (With nothing selected, the Properties panel shows document- and canvas-level settings.)
- Turn on Grid to enable it.
- Set its Size — the spacing between grid lines.
- Set a Grid color so the lines read clearly against your artwork.
The grid is stored per canvas. Remember that showing it and snapping to it are controlled by the separate Show grid and Snap to grid toggles in the View menu.
Layout guides
Layout guides are the real workhorses for structured pages — think magazine columns, a poster grid, or evenly divided rows. In the Grid & Layout section, click Add layout guide, then choose a Type:
| Type | Use it for |
|---|---|
| Columns | Vertical column tracks across the canvas. |
| Rows | Horizontal row bands down the canvas. |
| Grid | A combined column-and-row matrix. |
Each layout guide has its own settings:
- Count — how many columns, rows or cells.
- Gutter — the gap between tracks.
- Margin — the space held back from the canvas edge.
- Color and Opacity — so the overlay stays visible but unobtrusive.
You can stack more than one layout guide on a canvas — say a 12-column grid plus a set of rows. To delete one, use Remove layout guide. Show and snap to them with Show layout guides and Snap to layout guides in the View menu.
Reuse a setup for new canvases
Spent time dialing in a grid and column structure? Click Set as default for new canvases to save the current grid and layout-guide setup. New canvases you add will start from it, so a multi-page document stays consistent without redoing the work each time.
The bleed guide
For anything that prints to the edge, turn on Show bleed. It draws a red guide outside the trim edge marking the bleed zone — the area your background artwork must fill so the cut never leaves a white sliver.
Bleed amount itself is set in Document setup… (also reachable from the canvas inspector), and it is automatically included in your print PDFs. The bleed guide is purely a visual reminder of where to push artwork past the trim. For the full workflow, see Document setup & bleed and the practical walkthrough in Bleed & safe margins, done right.
Snapping, recapped
Popcorn Editor snaps in three independent ways, each with its own View-menu toggle:
- Snap to objects — align to other elements' edges and centers.
- Snap to grid — align to the modular grid.
- Snap to layout guides — align to column and row tracks.
Turn on only what you need. Snapping to objects and a busy grid at once can fight for control; isolating the one aid that matches your task keeps placement predictable and fast.
Where to go next
With your grid and guides in place, line objects up precisely with Align & distribute, or nail your document dimensions first in Canvas size, units & presets.