Right now I'm using the penultimate version of WP. A graphic is spilling over beneath the right-side link panel. In an earlier experience, a graphic was squeezed horizontally to fit the hard-defined frame or level.
Both effects are…interesting; but neither is very effective. Can helpful WP folks save me trouble by telling me the optimal width for an embedded graphic? Wait! Depends on the template, I suppose.
No I don't remember which theme I'm using. My fault, of course. But I don't recall the documentation for the theme having defined either the issue of whether graphics would be resized (or how) or the optimal width of frames/levels. I think that info would be helpful. Yes, I know I can load the template into my web-authoring software of choice and check the parameters.
Thing is, though, while I could load the template and check the parameters, and could even modify the template, that's not why I use WordPress. I use WordPress because I want to focus on content while leaving the programming to others. I think that for beginners to figure-out this stuff would be difficult or even impossible, while for pros to provide the crucial documentation would be easy.
Point? Nerds, please! Take a deep breath, roll your eyes, but provide training wheels in your documentation. :-)