Zoom centering

[Mike Reid]

Just a little suggestion...

It would be very nice if zooming with the mouse wheel would direct the center of the zoom towards the location of the pointer.  This way you could center your pointer on a star or object of interest and zoom in directly to it with the scroll wheel without having to go back and forth to the sliders.  There is another well known astro photo processing application that works this way.

Mike

[Nocturnal]

I agree this would be nice.

[Niall Saunders]

Hi Mike,

Just in case you were not aware - you can 'Pan' the image by 'pressing' the ScrollWheel and moving the mouse. So, in the meantime, you can very quickly 'grab' the location of interest and 'scroll-wheel-drag' it to the centre of the image view, then release the scrollwheel and continue zooming.

It is perhaps not as elegant as the method you were suggesting (and I do agree with both you and Sander on this anyway), but I have been 'managing' with scroll-wheel 'pans' in the meantime.

Cheers,

[Juan Conejero]

Hi Mike, Sander and Niall,

It would be very nice if zooming with the mouse wheel would direct the center of the zoom towards the location of the pointer.

OK, that's very easy to implement. I'll try to include this feature in version 1.6.1. However, it will be selectable via Preferences, as some users (including myself) prefer the current mouse wheel behavior.

Along with panning with the central mouse button pressed as Niall has pointed out, there are some useful temporary mode change keys in PixInsight. This is the complete set:

To temporarily change to this mode	Press these keys (X11/Windows)	Press these keys (Mac OS X)
Pan	SpaceBar	SpaceBar
Zoom In	Ctrl+SpaceBar	Alt+SpaceBar
Zoom Out	Shift+Ctrl+SpaceBar	Shift+Alt+SpaceBar

Note that the same temporary change keys work on scrollable graphics in standard process interfaces (CurvesTransformation, HistogramTransformation and ColorSaturation).

[Niall Saunders]

Thanks Juan,

Although I 'knew about' the Spacebar shortcuts, I had never used them. However, having just tried the <Ctrl-Spacebar> shortcut, I can immediately see how that will be useful for me to 'zoom to a rectangle'.

Cheers,

[Mike Reid]

OK, that's very easy to implement. I'll try to include this feature in version 1.6.1. ...

Wow!  That never happens with other astro software. 

Thanks,
Mike

[Carlos Milovic]

And, despite Juan's relativistic sense of time, updates are released very often.