There is no option in Recent Posts Widget With Thumbnails to set the line height. You need to adjust it with some custom style (CSS). However, this depends on the area you want to change. Do you want to change the line height of the title or excerpt?
You can try this:
.rpwwt-post-title{line-height: normal;} or .rpwwt-post-title{line-height: 1em;} or .rpwwt-post-excerpt{line-height: normal;} or .rpwwt-post-excerpt{line-height: 1em;}.
But there is no guarantee that this will work as these styles may be overwritten by others. It’s best for you to check it out.
I’m having the same problem. No matter what I do, the post title line height REFUSES be applied. I can see it right there and it’s not being overridden, but it’s also not being applied. The line height remains very tall
As you mentioned, the height is set in the styles. Thats the only thing Recent Posts Widget With Thumbnails can do. It is up to the browser to take this information into account. If you say that the style is not being applied, then the browser has a reason for doing so. Unfortunately, it’s beyond my ability to remotely determine why the browser behaves this way.