The bar under the canvas

The canvas bar: 1 the text tool, 2 the shape tool, 3 undo and redo, 4 the zoom controls.
1
Text tool
Click it, then drag a box on the canvas to place a new text layer at exactly the size you want.
2
Shape tool
Drag on the canvas to draw the shape shown on the button. The small arrow next to it switches between Rectangle, Ellipse, Triangle, and Star.
3
Undo and redo
⌘Z and ⌘⇧Z do the same thing from the keyboard. They step back through your edits, not through saves.
4
Zoom
Minus and plus step the zoom level. Click the percentage itself to jump straight back to 100%.
Controls that appear when you select a layer
Select a single layer and the right-hand group grows two more controls.- Align & Fit lines the layer up against the canvas: Align left, Align center, Align right, Align top, Align middle, Align bottom, plus Fit to canvas to blow it up to fill the whole design area.
- Flip horizontal and Flip vertical appear for pictures only. Flipping a face or a hand is often the quickest way to make two figures look like they are turned towards each other.
Snapping and rulers
Open the Settings tab, the gear at the bottom of the left rail.
The Settings tab holds the template's name and the two canvas view options.
- Snapping makes layers align to guides and to each other as you drag them, so a name lands dead centre instead of two pixels off. Leave it on unless you are placing something deliberately off-grid.
- Rulers draw a measuring strip along the top and left edge of the canvas, marked in the same pixels as your canvas size. Useful when a print area has to start at an exact distance from the edge.
Where to next
Layers and arranging
Work through the stack instead of clicking the canvas.
Design and preview frames
Understand the two frames side by side on the canvas.
Text content and style
Style the text you just drew.
Build a template
Start a new template from scratch.