A clean, consistent look does not have to mean fiddling with colours one element at a time. Pair a theme for the whole tab with style presets on the elements that matter, and a rough diagram becomes a polished one in seconds.
Start with a theme
A theme sets the look of the whole tab at once. Open it from the Theme & canvas button in the bottom-right corner of the editor (not on a Draw-mode whiteboard), which opens the Tab Style dialog. For the quickest result, pick one of its twenty-three Looks, which sets the theme, finish, tab font and canvas pattern in one click (or press Mashup, the first card, for a random mix of the four, again and again until one clicks); to choose a theme on its own, press Colours under Fine-tune. Picking a theme writes its colours, background, and pattern onto the tab, and from then on new elements inherit the theme's fill, border, and text colours, so everything you add stays on-brand automatically.
The catalogue ships with twenty-four themes in one browser, nine to a page, each working in light and dark mode. Themes you save yourself sit beside them. See Themes and Custom Themes.
Switching theme respects deliberate choices. Elements still on the old theme's colours take the new theme's; a shape or text you coloured by hand keeps its colour, and a canvas colour or pattern you hand-picked survives too. Arrows are the exception: every arrow takes the new theme's line colour, so connectors always match. Sticky notes and images are never recoloured by a theme. To bring a hand-coloured shape back in line, use Reset to Default in its presets (below).
Add emphasis with presets
Once the overall look is set, style presets let you make individual elements stand out without dialling each field by hand. Right-click a shape (or a selection holding several), open Style, and expand Presets.
For shapes you get one grid of looks derived from the active theme, in four tiers, each running quiet to loud: the theme accent at rising strength (plus a card per branch colour on a multi-colour theme), neutral greys, border treatments (hairline, outline, dotted and so on), and the semantic status colours (info, success, warning, danger, highlight). That is twenty looks on a single-colour theme. Each pairs a colour with a matching border weight and pattern, with the label colour auto-contrasted so text stays readable; your corner radius is left alone.
A preset follows the theme: switch theme later and a shape on the Bold preset becomes the new theme's Bold, rather than keeping the old colours. Change one of its colours by hand and it leaves the preset, keeping your colour from then on.
Arrows get their own twelve presets: solid weights, dashed and dotted patterns, and animated flows. Sticky notes, tables and charts have preset grids of their own too. Most grids end with Reset to Default, which returns the element to its theme look in one click. On a computer, hovering a preset previews it before you commit. See Style Presets.
Theme the tab first so new elements arrive on-brand, then use presets to lift just the handful of elements you want the reader's eye to land on.
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