FERS

Keyboard shortcuts

The modelling workspace is built around single-key tool switching, so most of a model can be drawn without leaving the viewport. Press H or ? in the app to bring the same list up over your model.

Keyboard

On macOS, Ctrl means Cmd. Tool keys are single presses with no modifier, so they work whenever the viewport has focus and you are not typing in a field.

File

Save
Ctrl+S
New model
Ctrl+N

Edit

Undo
Ctrl+Z
Redo
Ctrl+YorCtrl+Shift+Z
Delete selection
Delete
Copy selection
Ctrl+C
Copy (pick reference node)
Ctrl+Shift+C
Paste
Ctrl+V
Duplicate selection
Ctrl+D
Cancel / clear selection
Esc

Selection

Select all members
Ctrl+A

Tools

Select mode
S
Add node
N
Add member
M
Move (grab) node
V
Assign section (click members)
C
Add load (click node or member)
L
Add uniform load (click member)
D
Add moment (click node or member)
O
Add support (click node)
U

View

Cycle snap plane
P
Toggle grid snap
G

Help

Keyboard shortcuts
Hor?

Mouse

Left click is reserved for picking, so the view is moved with the other two buttons: hold the middle button to orbit and the right button to pan. The two jobs of the right button are told apart by distance: a right click opens the context menu, a right drag pans and does not.

Drag direction decides which selection rule applies, following the convention most CAD tools use: drag right and anything the box touches is selected; drag left and only fully enclosed objects are.

Navigate

Orbit (rotate the view)
Drag middle button
Pan
Drag right button
Pan (alternative)
Shift+drag middle
Zoom
Scroll

Pointer

Select object
Left click
Multi-select
Ctrl+Left click
Crossing select (anything touched)
Drag right
Window select (fully enclosed)
Drag left
Context menu
Right click

Snapping is what makes single-key drawing practical: P cycles the plane you are drawing in and G toggles snapping to the grid.

Related pages

Quickstart: your first model in the browser

Build and solve a 3D frame in the browser: materials, sections, nodes, supports, members, loads, Calculate.

Frequently asked questions

Do the shortcuts work on macOS?

Yes. Wherever Ctrl is listed, use Cmd. The single-key tool shortcuts are identical on both platforms.

Can I see this list inside the app?

Press H or ? with the viewport focused, or open Help (?) → Keyboard shortcuts. The in-app panel is generated from the same registry as this page.

Why does a tool key do nothing sometimes?

Single-key shortcuts are suppressed while a text field has focus, so typing a name does not switch tools. Click into the viewport or press Esc first.

What is the difference between dragging left and right?

Dragging right is a crossing select — anything the box touches is picked. Dragging left is a window select — only objects entirely inside the box are picked.