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Stack Exchange does not support vector-type images (SVG, pdf, etc.). This means that you can't upload pdf files here. …

No, you cannot change your decision. What you can do is: If you meant to vote/flag (in First Post/Late Answer), just go back to the post (outside the review queue) and proceed as you wanted to initi …

If you want to ask a new question, you should be very explicit about the difference with the old one. And if it is not convincing enough, it might end up closed as a duplicate. If you want to set a bo …

I wanted to include a diagram in an answer, but Mathjax doesn't support TikZ. I therefore wrote the TikZ code in a local .tex file in my PC, compiled it, and included the diagram as a .png file. …

Reputation has nothing to do with you being able to change your profile pic. You should be able to change it, as often as you like, and to whichever image you want (with the obvious exceptions, cf. th …

I'd like to address some points that rob didn't touch upon. First of all, I want to say something about your comment I just want to understand how to improve a post is good, maybe I made confusio …

You'll get the badge if and only if the edit gets approved by the reviewers in the Suggested Edits queue. In your particular case, the edit is approved, and you have accordingly received the badge. F …

Yes, if the bounty expires with no answers with positive score, it goes to waste. And yes, it is possible and allowed to answer the question yourself, but you cannot award a bounty to yourself, even i …

If the edit fixed the issue, yes. The flag will probably be rejected. If you think the edit fixed the issue, yes. You should retract your flag. If the edit did not really fix the issue, you should …

If it is a one-time thing, just fix it however you like – roll-it-back first or don't, whatever float your boat: If the edit was too drastic, it is usually easier to roll-it-back first. This changes …

Some suggestions: Stop using your "student" notes as a reference. We do not care where your question comes from, and unintelligible scribbles from a student are of no use to us. Stop using books/web …

"formula questions" could mean anything. If the question is "give me the formula to solve my problem", then the answer is no: such questions are disallowed. On the other hand, if your question is abou …

I completely agree with Aaron Stevens' answer: the reason I voted to close is the one given in the close banner. That being said, the question is not terrible either, and it could make a nice post on …