Author: Thomas Ott

# QFitsView Main Display

The main display shows the currently loaded FITS image. The brightness and contrast can be adjusted by dragging with the left mouse button pressed inside the display. A right click will show a popup menu with some commands.

The following keys have a meaning inside this window:

- d: Press and move mouse while pressed to measure distances
- g: Do a two-dimensional gauss fit to the area under the mouse cursor
- l: Stop / Start updating on mouse movements

When a FITS cube is loaded, the following additional keys are available to manually extract a spectrum:

- s: Add source pixel
- c: Add continuum pixel
- x: Remove pixel from spectrum
- r: Completely remove manually defined spectrum

The manually defined spectrum is shown in green on the Cube Spectrum Window.