Hello,

2 questions here.

How to rotate selection, be it custom or rectangle or circular?

How to easily draw ready shapes, like rectangle and circle? I haven't found them in the toolbox.

Thanks.

I have a gif which supposedly has an alpha channel. When I try loading it onto a site, it always shows an opaque black background. I would appreciate it if anyone could tell me what I'm doing wrong. Thanks.https://www.dropbox.com/s/wygkz0iqmqh0e2...2.gif?dl=0 

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Attached is a screenshot of what I'm looking at.  My avatar file has been chosen - but I don't know where to click next to upload it.  Clicking on the bottom button (Choose Avatar) brings me to a bad page.   Please help.

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I need to reduce a file size to 100kb - but don't know how.  Attached is the current information for that file:  Please help me with the procedure so I can save the reduced size file as a jpg.  Thank you.

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I am making a blank paintable map from a game's map that it uses to make the provinces in-game. I want to know how to make the border between all the different colours instead of individually selecting them and making a border.

Let's say I have an image.
I roughly cut out leaving a border of 20-30 pixels say.

How can I have the border of the image stretch out to the edges of the picture and blend into white?

See the image below. I intentionally kept the picture dark to illustrate what I want.



I've never seen it done anywhere - but I can't see why it wouldn't be possible?

Thanks.

Say I crop a picture.
On the left I have an edge that is 5 pixels - after my object.
I want to have a border around my object be 20 pixels say.

How can I stretch the edge and make it 20 pixels?
I used to do this in Photoshop.

As an example see the image below


Say I want to stretch the left hand side.
Ignore the shadows! This is just an image I took off the internet to help ask my question!

Thanks.

I am trying to do this project where I take a photo of my face every day, and I want to stabilize my photos using GIMP. In my first picture, my face is more zoomed out than in the photo I want to edit, so I want to shrink the photo I am editing to fit that. How can I change the size of a layer? 

Similar to this instance of this video: https://youtu.be/FGXGHYonfGM?t=178

OS: Ubuntu 16.04

GIMP: 2.8.22

When i want to use the perspective tool (in fact, any other tool too - like the rotate tool), with a small image, I find that the grid lines are so close that I cannot make out whether i have moved the corners/ rotated the image sufficiently.

Is there any way to reduce the number of grid lines or increase the distance between them in such a case?

How do I obtain the algo/kernel/convolution mask for the various filters in gimp?

For instance, I was interested in the numbers behind  https://docs.gimp.org/en/plug-in-oilify.html

so I could customize them per my needs, and create new filters per my needs.