A Kitten Dies Every Time You Use Scroll Bars

Juan Conejero

PTeam Member
Sep 2, 2004
7,404
68
56
Valencia, Spain
pixinsight.com
If you want to consider yourself an intermediate/advanced PixInsight user, please don't use scroll bars (on a regular basis) to navigate image windows.

There are two ways to perform a temporary switch to Pan mode:

- Press the spacebar key and hold it down, then click the primary mouse button on the image and drag.

- Click the middle mouse button on the image and drag.

Both methods are much faster and more accurate than using scroll bars, plus you can navigate in both plane directions at the same time.

In similar ways, you can:

- Use the mouse wheel to zoom in/out the image.

- Use Ctrl + mouse wheel to zoom in/out centered at the current cursor position on the image.

- Use Ctrl+spacebar to switch to Zoom In mode temporarily. In this mode you can define a rectangular area to approximate the area of the image that will be zoomed in the view.

- Use Ctrl+Alt+spacebar to switch to Zoom Out mode temporarily.

On macOS, replace Ctrl with Cmd in the above list.

So let's save those kitties, please, especially when you record a video!
 
  • Like
Reactions: Buzzbomb

Juan Conejero

PTeam Member
Sep 2, 2004
7,404
68
56
Valencia, Spain
pixinsight.com
Yes, spacebar + drag works fine on an Apple trackpad. Note that in this case you don't have to click, just press space bar and move your finger on the trackpad. Of course, you can also pinch with two fingers on a trackpad to zoom in/out.
 

tommy_nawratil

Well-known member
Feb 28, 2012
74
2
- Use Ctrl + mouse wheel to zoom in/out centered at the current cursor position on the image.

hm, does not work as indicated for me - I was expecting the cursor position will act then as the zoom center, but it does not.
Scrolling the mouse wheel causes zooming in, but just away from the respective frame edge
that is in the direction of the cursor position (if it is a little off the center), not from the cursor position itself.
So it is not possible to choose a point by placing the cursor and zoom in on that point by Ctrl + mouse wheel.

Tommy
 

Juan Conejero

PTeam Member
Sep 2, 2004
7,404
68
56
Valencia, Spain
pixinsight.com
So it is not possible to choose a point by placing the cursor and zoom in on that point by Ctrl + mouse wheel.
I don't see the problem you are describing. When I use Ctrl+Wheel it works as described above. Anyway, the preferred method to zoom in accurately is Ctrl+Spacebar, then click and define a zoom area by dragging.