To Upload to a File Sharing Site:
Take your photo. So long as it is 10 megabytes (MB) or less in size it is not necessary to resize it for the site am going to suggest.
Goto this website:
https://imgbox.com/
Once there upload your image file to Imgbox. (Note that your image file has to be in JPG, GIF or PNG format to upload it to Imgbox.) To do that just drag the file from Windows onto the Imgbox window in your browser.
On the next screen that will open up, for content type select "Family Safe Content".
For the Thumbnail setting, just leave at the default.
For the Comments setting, select "Disable Comments".
For the Gallery Option, select "Do not create a gallery".
One you have done the above click the "Start upload" button. (Your image file will be uploaded to Imgbox. And a new display will appear.)
In the new display click anywhere in the box that is titled "BB-Code" this will highlight the code inside the box. With the code highlighted, right-click on it and select "Copy" -- this will copy the code into your computer's clipboard.
Now switch to the browser tab or window that you have opened to this OpenOffice Forum. Start a new message that you want to post into the forum and in your new message paste the code that you copied at the Imgbox website. (Do not alter the code in any way.)
Once you've done that "Preview" your message to make sure you can see the thumbnail of your image. (It will be smaller than the actual image you created, but don't worry about that.) If you can see the thumbnail, and the rest of the message you want to send is okay, then press the "Submit" button to send your message into the forum. Now people will be able to look at the image you uploaded to Imgbox by clicking on the thumbnail you posted in your forum message.