Hi,
You can edit images right in Concrete. To adjust image size in the editor, look in the tool bar for the image editor (looks like a little tree) (make sure you're using an advanced editor... you can select the editor options from your dashboards Sitewide Setting page). The size can be controlled using the appearance option in the image editor window.

Also: Images can be edited right in your File Manager by clicking on the image and choosing the "edit" option to open the Picnic editor software.

Do you know if there is any way to automate the resizing (upon uploading the image). IE automatically create a subversion of the image with a max width and height?

I've not come across an automated solution yet. Typically, I'll pre-size my images to the largest needed on the site (usually not bigger than 600px for example). Re-sizing multiples can be done in photoshop as a batch, or with Pixresizer (free download)by folder at a time prior to uploading to the site.

OK, I am a newbie, but have already spent hours merely trying to resize an image. Adreco's answer has me totally baffled. I can't find anything that looks like a tree. In my dashboard Sitewide Settings page, the only advanced editor options I can find are for the rich text editor. I tried readjusting the size by changing the pixel dimensions, but that had no affect. Can't I merely "grab" the border of the image and "stretch" it? Holy mackerel, I can do that using MS Word, which is one of the worst pieces of software I've ever had to deal with. Why is this so painful?

To resize an image within the content text panel TinyMCE I have only managed to get resizing handles when using Firefox and Internet Explorer. I believe there is a problem with Webkit which Safari and Chrome use so the resize handles don't appear.

Hope this answers you question?!

Make sure you have selected "Office" or "Advanced" instead of the basic Tinymce editor layout (from your dashboard's sitewide setting tab... look to the bottom right of the page to select different options)
When I use the Advanced editor layout, the image icon (looks like a little tree) is on the right side of my tool bar, second line from the bottom.
This will allow you to size the pics exactly, not by guess or trial if you need consistent image size in multiple blocks.
The tools are all there.

I'm having similar problems, cannot control the size of my image. No matter how I edit or what settings I enter using the image block or the edit image icon, the image appears the same.

"You can edit images right in Concrete. To adjust image size in the editor, look in the tool bar for the image editor (looks like a little tree) (make sure you're using an advanced editor... you can select the editor options from your dashboards Sitewide Setting page). The size can be controlled using the appearance option in the image editor window."

I can't find the Sitewide Settings on the dashboard.

Any suggestions?

Thanks!!!

how can you active Picnic editor software? i canot edit image it's only spin blank popup? is there something other configuration? i'm still play in local and set advanced editor.

after that got this error : Fatal error: Maximum execution time of 60 seconds exceeded in D:\www.amazon.com\concrete\elements\files\edit\image.php on line 56

when I select an image in the File Manager tab of the Dashboard and click "edit"... Picnic editor automatically loads by default.
On my sites, Picnic normally launches in less than 15 seconds, so I haven't experienced the time-out problem.

You can also use css to set the max width to 100% with a height of auto and the image will fill up to the maximum width of the container width (unless it is smaller than the container).