On 01/08/2012 03:41 PM, Cristian Secară wrote:

În data de Sat, 31 Dec 2011 22:05:24 -0500, Steve Kinney a scris:

[...] If for some reason you want precise dimensions for the sections, calculate using the DPI of the image to get linear measurements, and use the Image> Guides> New Guide command to position guides exactly where you want them.

Supposing I have already set a guide in the manner described above and later want to modify the exact position entered. How can I modify the existing guide coordinate ?

Since there is nothing attached to a guide, you can delete it and create one at the new position.

On 01/08/2012 07:10 AM, Ofnuts wrote:

On 01/08/2012 03:41 PM, Cristian Secară wrote:

În data de Sat, 31 Dec 2011 22:05:24 -0500, Steve Kinney a scris:

[...] If for some reason you want precise dimensions for the sections, calculate using the DPI of the image to get linear measurements, and use the Image> Guides> New Guide command to position guides exactly where you want them.

Supposing I have already set a guide in the manner described above and later want to modify the exact position entered. How can I modify the existing guide coordinate ?

Since there is nothing attached to a guide, you can delete it and create one at the new position.

Or just move it with the mouse and watch the position indicator at the bottom of the screen :

On 01/08/12 19:03, Burnie wrote:

On 01/08/2012 07:10 AM, Ofnuts wrote:

On 01/08/2012 03:41 PM, Cristian Secară wrote:

În data de Sat, 31 Dec 2011 22:05:24 -0500, Steve Kinney a scris:

[...] If for some reason you want precise dimensions for the sections, calculate using the DPI of the image to get linear measurements, and use the Image> Guides> New Guide command to position guides exactly where you want them.

Supposing I have already set a guide in the manner described above and later want to modify the exact position entered. How can I modify the existing guide coordinate ?

Since there is nothing attached to a guide, you can delete it and create one at the new position.

Or just move it with the mouse and watch the position indicator at the bottom of the screen :

The trouble with that is the level of control is fairly crude.

I hit this recently in the context of cropping out a section of an image. I needed a 1024x1024 for an external FFT application. Doing that with the mouse is not very realistic.

I would have liked to use the arrow keys to fine tune the selection but as soon as I let go of the mouse drag operation the dimensions of the selection are not longer displayed.

This seems like an oversight since until the selection dimensions are confirmed the co-ords need to stay up.

I ended up cutting out larger and then using ImageMagick to finish the job.

/gg

gg@catking.net wrote:

The trouble with that is the level of control is fairly crude.

I hit this recently in the context of cropping out a section of an image. I needed a 1024x1024 for an external FFT application. Doing that with the mouse is not very realistic.

FWIW, I have two workarounds for this.

One is to create a new layer in the image, sizing the new layer to 1024 x 1024 (or whatever size needed, I change the opacity of the layer to a low enough value to be able to see the layer below, and move the to just the place I want it. Then I select the whole layer, and using the layer dialog, change the active layer to the layer containing the material I want, and crop the image to selection. Then finally, I delete the layer I added.

The other is to use the rectangle selection tool, and select the area in the approximate area I from which I want to extract material. I use the adjustment parts of the rectangle tool to adjust the size, and while one is adjusting, the size of the rectangle is shown in pixels. Then I either crop the image to the selection size, or copy the part of the image I want to the clipboard, and create a new image from the clipboard.

But I'd still like to have a keyboard shortcut to create a guide. There are sufficient number of occasions when I know I want a guide at a specific place, and it would be quicker to press a few keys, than move the mouse around.

ns

On 01/08/2012 11:40 PM, Noel Stoutenburg wrote:

But I'd still like to have a keyboard shortcut to create a guide. There are sufficient number of occasions when I know I want a guide at a specific place, and it would be quicker to press a few keys, than move the mouse around.

Challenge accepted:

Image/Guide/New guide, you can assign a short-cut to it, for instance Ctrl-Shift-G. This gives:

- [Ctrl-Shift-G] - [Cursor up] (horizontal) or [Cursor down] (vertical) - [Tab] (switches to position field) - [3]+[8]+[2] (enter new position)
- [Enter]

Could be a bit more deterministic if H/V shortcuts were usable in the direction selector.

On Sun, Jan 8, 2012 at 8:48 PM, wrote:

I hit this recently in the context of cropping out a section of an image. I needed a 1024x1024 for an external FFT application. Doing that with the mouse is not very realistic.

Sigh... You guys sure like to go the long way around... Both rectangle select and crop tool have size constraints. In this case, grab crop tool, set it to fixed size, set size to 1024x1024 and crop away. With nice preview of what's in and what's out too...