MolDraw Docs

Phone and tablet

Short answer: Open moldraw.com in your phone or tablet browser. Common tools sit in the left rail, and the Atom, Rings and More buttons at the bottom open sheets with the rest. Pinch to zoom, drag two fingers to pan, and tap with two fingers to undo.

Last updated · By the MolDraw team at LabCanvas

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On screens up to 1024 pixels wide, and on touch tablets, MolDraw uses a touch layout. Menus open as sheets that slide up from the bottom.

Where the tools are on a phone#

Place What it holds
Left rail Select, single bond, double bond, chain, benzene, reaction arrow, text, plus charge and erase
Atom (bottom) The element picker, charges, lone pairs, Add H and Show C. The sheet stays open, so you can pick an element, tap the canvas and pick again.
Rings (bottom) Ring templates in tabs: Common, Aromatic, Heterocycles and More
More (bottom) Text, reaction arrows, shapes, brackets, atom labels, orbitals, images and glassware. Also Selection…, File, Export, Actions, Search and Settings.
Gear (top bar) Settings, as a full screen sheet
⋮ (top right) Account, Theme, Language, File, Actions, Settings, Landscape view, Fit drawing and Clear canvas

Tap a bottom button again to close its sheet.

  1. Tap a tool in the left rail, such as the single bond.
  2. Tap or drag on the canvas to draw.
  3. Tap Atom and pick an element. Tap an atom on the canvas to change it.
  4. Tap Rings, pick a ring and tap the canvas to place it.
  5. Open More, then Export, to download your drawing.

Touch gestures#

Gesture Action
Pinch Zoom
Two finger drag Pan the view
Two finger tap Undo
Three finger tap Redo
Long press on an atom, bond, selection or empty canvas Quick action ring, such as Label, + charge, Duplicate, Delete or Paste
Long press on a tool icon Opens that tool's options

While you drag a bond, ring or chain, a 2× magnifier shows above your finger, so your finger does not hide the target.

Touch settings#

Open Settings, Touch screen:

  • One-finger pan on empty canvas: with the Select tool, one finger on empty space pans. Off by default.
  • Magnifier while drawing: the 2× loupe. On by default.

See Settings reference for every option.

Landscape view#

Turn your phone sideways for more room. On a phone held upright, open ⋮ and tap Landscape view to rotate the editor. In landscape, the atoms sit on the left and the tool strip runs along the bottom.

Tablets and pens#

Tablets use the same touch layout, with a wider canvas. A stylus works like a finger. The Smart Draw plugin turns pen sketches into structures.

Tips#

  • Use ⋮, Fit drawing to bring the whole drawing back into view.
  • The command palette needs a keyboard. On a tablet with a keyboard, press Ctrl+K.
  • Your work saves in the phone browser. Download a .moldraw file from File to keep a copy. See Save and open your work.
  • For 3D on a phone, see Troubleshooting if you see a 3D warning.

Questions and answers

Does MolDraw work on iPhone and Android?

Yes. Open moldraw.com in the phone browser. MolDraw switches to a touch layout with bottom sheets.

How do I undo on a phone in MolDraw?

Tap the canvas with two fingers to undo. Tap with three fingers to redo.

How do I zoom in MolDraw on a tablet?

Pinch with two fingers to zoom. Drag with two fingers to move the view.

Where are Settings on a phone?

Tap the gear in the top bar, or open the More sheet at the bottom and tap Settings.

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