You have to 'Save As' and select the JPG, JPE etc. format. That is not available if there are layers or it is a 16 bit file. Also, there are other size restrictions for uploading to Nikonians listed above. Using the 'Save For Web' option will convert to the proper format for you but will strip the EXIF data and maybe not to the required file size. I would save the PSD first to keep the original, then save for web.
My 2 cents, After reviewing a batch of pictures from a recent trip I decided to process them in Litghtroom to get them to the desired size and weight to publish them to our gallery but found it a bit frustrating since some of them did not reach down to the desired limit of 300Kb after cropping and down grading the images.
I would suggest reviewing the possibility of increasing the maximum size to at least 500Kb or more if possible, this would allow publishing more and better looking image with less cropping, enhancing the Nikonian site quite a bit, in the end this forum is about graphics.
Antonio, If you upload at the Galleries, images sizes can be up to 1,800 pixels at their longest size (if larger, the system will re-size them down to 1,800 pixels), and the "weight" up to 10MB.
For forum posting you can then use the "easy forum link" feature that will post a thumbnail, however, automatically will link to the larger image at the galleries. An explanation of this method is here
If you want to post directly, not from the galleries, the max size is 1200 pixels. the reason for this is to prevent the need to scroll to the right to see an image and to be able see it complete, even on medium to small monitors.
To make an image 300Kb you don't need to crop. You may need to compress, usually at 70% with 72 to 96 ppi resolution. If you have been playing with layers, just make sure they are flattened before saving, to make the file more compact.
I have used Nikonians for post wildlife images since I joined 4 months ago. In the past couple weeks I can post a message, but most of the time I can not post an image from my computer. I have followed the guidelines as usual with files no bigger than 300kb and the long side of the image at under 1200 pixels.
My image window pops up at times saying I have to remove some image files to be able to post. This is not true because the image file window shows hundreds of image files which are not mine.
Something is wrong and not on my end because I post elsewhere and have posted here for 4 months without a problem. The last 2 weeks has been a hit and miss relating to being able to post images from my computer to the wildlife forum????? I have run a tune up on my internet cleaning out temporary files and history.
I have contacted Nikonians support and of no help so far.
Yes, it works at times, but most of the time I can't post. The review window shows my message and image ok, but when I push the post button it does not post. I sent the Nikonians support a screen copy of the error statement I'm getting off and on that states "error, maximum number files exceeded". There must be a thousand files in this window that aren't mine ugh!!!! I have had no problems in the first 4 months I have been on the Nikonians forum, but in the last couple weeks most all my postings don't go through. I can post messages, but most of the time not images.
I'm also having problems posting with the IE version that comes with Win8. The picture shows that it has uploaded but nothing shows up when you post the message. I have found as a workaround that I can grab the link that is given with the upload succesful message and paste that in the window. The pic then shows when you post the message.