Image hosting sites offer a handful of pre-set sizes (eg thumbnail, small, large). If none suit, here's one method for resizing images within TiddlyWiki.
If using a URL, wrap it in HTML tags and insert 'style="width: 70px; "' or 'style="height: 146px; "' (altering the px to desired size) before '/></html>' like this:
<html><img src="url of image" style="width: 70px; "/></html>
If using HTML code from a hosting site, insert 'style="width: 70px; "' before /></a></html> like this:
<html><a href="link" style="width: 70px;" /></a></html>
You can also use ImageSizePlugin from TiddlyTools to resize images without using HTML.
If using a URL, wrap it in HTML tags and insert 'style="width: 70px; "' or 'style="height: 146px; "' (altering the px to desired size) before '/></html>' like this:
<html><img src="url of image" style="width: 70px; "/></html>
If using HTML code from a hosting site, insert 'style="width: 70px; "' before /></a></html> like this:
<html><a href="link" style="width: 70px;" /></a></html>
You can also use ImageSizePlugin from TiddlyTools to resize images without using HTML.