Pictures Overview

Two kinds of pictures can be added to a published site:

Pictures are added, changed and removed using Site Builder menu options as usual, but it will normally be necessary to do some preparatory work first.


The number of pictures on a site is limited to 800. When the total reaches that limit, all subsequent uploads will be blocked.
The number of pictures on any one page is limited to 25. Any attempt to add more will be blocked. The default display of pictures on any one page is also limited to 25.

If your image files were produced by from a modern digital camera or smart phone they are likely to be very large, taking a long time to download when the site is being viewed. The limit for uploaded image file size is 1.5 megabytes, and the easist way to achieve this is to reduce the image width to 1200 pixels before reloading. This will not adversely affect the quality of the image when shown in a web browser. It may also be desirable to improve your picture's quality by cropping unwanted areas and altering brightness and contrast. The dimensions of all uploaded images will be adjusted automatically to fit the screen on which they are viewed.

Identifying pictures

The system will block attempts to upload any file with exactly the same name as one which is already in place, so please ensure that all your image files have unique filenames before uploading them. File names should contain only alphanumeric characters (letters and numbers), plus a hyphen if you wish, and (obviously) the dot which precedes the file extension. The only file extensions accepted are .jpg, .jpeg, .png and .gif.

You will also be asked to give each picture a title, and (optionally) some details about it. When a picture is shown on a page of its own its title will appear as page header, so it needs a meaningful tile rathar than a filename. It is quite acceptable to give several related pictures the same title - only their filenames must be unique.

Images on your site should "earn their keep" by illustrating your own U3A's location and range of activities, ideally along with some accompanying text. If you find it difficult to decide on a suitable title for a picture, or explain why it is there, ypu may need to think twice about including it!

How pictures are used

You can show only one picture on the Home page at anytime — if you add more the one most recently loaded will be shown. For other pages the most ecently loaded go in the sidebar — if there are more than five they are shown as "thumbnails" in a block below the page text. If visitors click on one to see it in full size, they will be able to follow successive links through all the other pictures for the same page, in reverse order of their upload time.

You now have an additional option to change the default display order of pictures in sidebar and 'overflow' block by applying an extra sequence number to them.

If you put a new logo on the Home page it will supersede the default U3A logo and be shown on all the other pages as well. But you can add a logo to any other page as a one-off, when it will also supersede the default. You can show only one logo per page as there is only one place to put it: on the right of the page header.

The standard U3A logo now links automatically to the site for the Third Age Trust. Uploaded logos may also act as links to related external sites - just enter the destination URL in the relevant data entry form. But check for possible legal restrictions before uploading proprietary logos to act as links.

If the "Gallery" button is activated, a selection of pictures on the site will be shown on the "Gallery" page as a block in "thumbnail" form. If visitors clicko n a thumbnail to see it in full size, they will be able to follow successive links through other gallery pictures. The pictures will be shown by their "parent" page - by default in reverse order of their upload time, but taking into account an sequence numbers assigned by the editor. You also have an option to assign an 'omit from gallery' property to pictures like small decorative gifs which do not benefot from being seen 'at full size'.

See also Inline Pictures for help about inserting pictures into normal page text.