That’s the operator panel you’re showing. It shows the options for the last operator which disappear after you do something else, because the options for the current one takes their place.
Object scale is quite hard to understand, and explain, because there’s no good real life equivalent. I also know things are harder to explain and understand without visuals. Screenshots of the full interface help explaining when asking questions, an example .blend helps to relay most information for collaborative troubleshooting, and the file is used to produce visuals when communicating back.
But when you’ve participated in thousands of threads that have to start with squeezing the information out, “show screenshots and post a .blend”, it’s not fun anymore. Easier to not even read the threads if they don’t contain enough information, or save time by not producing visuals when there’ s no existing ones to draw on or .blend file to take shots from.
Learned a lot from troubleshooting all kinds of issues but the off chance of learning something new is further and further away. Not very productive to learn something new when the process is unnecessarily painful. A bit like having to go through all the material from the primary school each time you want to learn something new about computer vision.
The issue can be solved with communication, which is why I made the tutorial linked in my signature. I think this is the most valuable thing I’ve learned through posting on a forum that focuses on visual arts. A piece of art and communicating anything, even technical stuff, have a lot in common. Art is surprisingly technical for one, but the goals and mechanisms are also similar;
For example, context and the story is important in both to be effective. There has to be a start, then continue to the point, and describe where it’s going. “There’s a girl who’s a princess and she’s a bitch” is not a good fairytale, similarly “I did something and it renders black, what could be wrong” is equally crap.
Composition rules apply to text. We’re using paragraphs to have a visual separation in the flow of information we’re putting out. No difference between a piece of artwork and communicating something technical, although visual communication wins against wall of text every time. Cleverly using both should be most effective.
Ironically a wall of text is what this post has become, but thought I write these. Might be something to consider if you look more into visual arts, as communication can be something that helps you in your work, not just hobby. http://www.davidrevoy.com/article242/what-skills-are-needed-to-draw