The AerTwin window

When you open a structure, the window fills with the 3D view. The toolbar runs along the bottom, and panels open over the edges of the view when you need them.

Schematic of the AerTwin window with the Measurement panel, the Observations panel and the source photographs open. The numbers refer to the table below. Click the picture to open it full size.

No.	Area	What it is for
1	3D view	The live picture of the model. Pins, labels and outlines are drawn over it. Drag to orbit, right-drag to pan, turn the wheel to zoom.
2	Toolbar — tools	Navigate, Measure and Advanced. The lit button sets what your next click on the model does.
3	Toolbar — panels	AI defects, Photos, Measurements, Instruments and Observations. A lit button means its panel is open.
4	Toolbar — help	Explain (what anything on the screen means), the flag ⚑ (report a problem) and the bell ◉ (team activity).
5	Status line	The state of the connection, and a short message after each action — for example “measurement cancelled”.
6	Measurement panel	The figures for the selected measurement, and the controls to measure, shape, save or delete it. Opens on the left.
7	Right-hand panel	Observations, AI defects or Instruments. The right side holds one of these panels at a time: opening one closes the other.
8	Source photographs	The calibrated photographs that show a point you pick. Opens along the bottom, above the toolbar.

Windows that open over the view

Window	Opens when	Closes with
Finding form — titled New observation, Save measurement, or Edit and the finding’s number	You record or edit a finding	Save, Cancel or Esc. Drag the form by its title bar; resize it from its lower-right corner
Photograph	You click a photograph in the strip	✕ or Esc
Review panel	You start a review of AI proposals	Leave review
Report a problem	You click the flag ⚑	Send report or Cancel
Are you still there?	Nothing has been touched for 2 minutes	Any mouse movement or key press

Signs on the view

Sign	Where	Meaning
Section plane on with Clear	Top centre	Part of the model is cut away. Clear puts it back whole
AI Review mode	Top centre	The AI defects panel is open and proposals are drawn on the model
Orange outline with points	On the structure	A measurement. Orange is the measurement colour
Pin with an OBS-… label	On the structure	A saved finding. The pin never moves; its label may move to stay readable

Resize and collapse the panels

• Drag the inner edge of a side panel to make it wider or narrower.
• Click the arrow in a panel’s header (‹, › or ⌄) to collapse the panel to a thin bar. Click the arrow again, or the panel’s toolbar button, to restore it.
• Collapsing a panel keeps its content as it was. Clicking a lit toolbar button closes the panel.