adjusting picture size in Sigil

[rosshalde]

Hello
Thank you for everyone helping me. I have learned a lot just in a few posts here that has helped me move forward with my project of making a nice epub.
Once pics are added to Sigil, is there a way to alter their size inside the program?
Or, do I have to change the image size first and then delete the original photo and add the new altered size photo?

[eschwartz]

I'd suggest resizing it outside Sigil. But you can also use the
height="x" width="y"
attributes for the <img/> tag and let the reader app/device do the resizing.

[exaltedwombat]

Also consider the difference between a printed page and the variety of readers your eBook may encounter. If a picture's worth seeing, there's much to be said for allowing it full screen width (only 4.5" on many popular eReaders), or even giving it it's own page (the only practical method of ensuring a caption stays with its picture). If it's merely decoration, there's much to be said for leaving it out.

[dwig]

Originally Posted by eschwartz

I'd suggest resizing it outside Sigil. But you can also use the
height="x" width="y"
attributes for the <img/> tag and let the reader app/device do the resizing.

+1

Note that there are two different aspects of "image resizing", One is changing the size of the image file in bytes and in pixels, and the other is altering the displayed size in the ereader.

1. You can't resize the actual image in Sigil. The size in pixels and in bytes can't be changed without using a separate image editor to resample the image files.

2. The height and width attributes don't alter the size of the image itself. Instead they instruct the ereader to display the image at a size different from its native size.

If the reason you need/want to resize the images is to reduce the file size of the ebook then resampling the images in an image editor is what needs to be done.

[eschwartz]

Originally Posted by dwig

If the reason you need/want to resize the images is to reduce the file size of the ebook then resampling the images in an image editor is what needs to be done.

And it kind of wants to be done anyway. Once you are resizing, you might as well trim out entirely, anything you aren't using.

[Notjohn]

Originally Posted by rosshalde

Once pics are added to Sigil, is there a way to alter their size inside the program?

Actually, there is. If what you want to accomplish is to enlarge the image so that it fills the text area (that is, with a slight margin all around, as distinct from the Zoom feature in many e-readers) you can add a width="100%" instruction to the html. This works in all Kindle/Fire readers and apps, though I haven't tested it out on the iPad for example. (The early generation Kindles ignore the instruction, but they enlarged every image by default, unless it be very, very small.)

In the early days of the Kindle, we were instructed to upload images 450 pixels wide, which has turned out to be a thumbnail on the HD tablets, especially the 9 inch Fire HDX. Yet even those small images look pretty good on today's tablets when they fill the text area. I have not found it necessary to recreate the images for the books I uploaded in 2007 and 2008.