resize the picture

sometimes the picture will not be automatically reduced.

So only half of the picture is displayed

Supplement: the picture needs to be downloaded to the computer for adjustment, just use ACESEE, open it for modification, then find the picture size, and it can be modified as required.

After tuning, upload it to a cyberspace. Generally, forums can upload pictures, and then just put that address in the signature.

I don't know what you mean by how to get the expression on the forum, but do you want to put the expression in your signature? If so, just do it, find the expression you see, right-click, write down the website, put it in your signature, and it's OK.

when you put [img] and [/img] before and after the photo URL mentioned above into your signature, it's generally OK.

If you are an administrator, log in to the background, and then find the emoticon management to replace your new emoticon. I'm not impressed, but it's OK to do so, or you can FTP into the website server and then replace the emoticon file.