Let's preface this by stating We Are Not Lawyers, and if you have any doubts about your right to take pictures, then you're probably better off not submitting it to us. However, there is a useful guide available which outlines your rights in the UK fairly concisely.
Yes, as with any of the information you added when submitting, this can be edited using the 'Change image details' form which is linked to just below the photo on its main page.
Yes, older photographs are welcome, as long as they were taken by the contributor, or a member of their close family (with credit to the photographer). Please crop any white border from a print, as well as any date stamp on the image, before submitting.
You can submit all your photos under a pseudonym by changing the name on your Profile http://www.geograph.org.uk/profile.php (link top write on most pages). Note that by doing this, the name will be changed on all photos you have previously submitted from the account. These may already have been used elsewhere, crediting the name originally shown.
You can change the credit on an individual image, for instance if you asked someone else to take it for you, but the name on your profile will still be shown on the photo page and the photographer name will still link back to your profile.
You can open another account under a pseudonym but this will need to be done from a different email address and you will have to take care which account you are signed in with before submitting, making changes or posting in the forums.
Either:
1) Resize the image before you send
or
2) Limit the size of the image before you take it.
Most smartphones allow you to tweak the size of the image before you take the pic. You might find editing software for your smartphone to help you edit the image to get the size below 8MB.
You can't revoke the Creative Commons licence you have given The World when submitting your photos, and we would like to ensure as best as we can that you continue to get credit for your images wherever they are used. If you stop submitting, your existing photos remain visible and credited to yourself for this reason.
If you would prefer no longer to be identified as the photographer of the photos you have uploaded, you can change your real name in your profile http://www.geograph.org.uk/profile.php?edit=1 to show a pseudonym, or you can ask us http://www.geograph.org.uk/contact.php to anonymise your account. In either case, your decision is reversible should you change your mind - which of course we do hope!
If your friend asks you to and for some reason cannot create their own account then that's fine provided they understand the Creative Commons licence. You should credit them as the photographer when submitting.
See related article: Photos not taken by submitter
If you're the first to submit a "Geograph" for the grid square you'll get a "First Geograph" point added to your profile and the warm glow that comes with it.
We welcome many Geograph images per square, so even if you don't get the point, you are still making a valuable contribution to the project.
In addition we now award "Second Visitor" points (and Third and Fourth!) - which are given to the first Geograph the second contributor adds to a square. The third contributor similarly gets a "Third" point for their first Geograph to the square.
So a single square can have a First, Second, Third and Fourth Visitor point, but a contributor can only get one of those per square.
You can earn yourself a "Personal" point by submitting a "Geograph" for a square that is new to you, regardless of how many contributors have been there before.
TPoint or 'Time-gap Point' is a new kind of point. A contributor can gain a TPoint by submitting a contemporary photo to a square that hasn't had a photo for 5 years. The aim is to increase the date range of available photos per square.