There are several Selection tools available:

You can also use 'bulk' tools to work with multiple frames at once:

You should also be aware of:

Adding to and removing from selections
To select a frame, click on it with the left mouse button.

To add another frame to the selection (forming a 'multi-selection'), hold down the Ctrl key and click on another frame.

Multiple frames can be selected at once by holding down the Shift key and clicking on another frame.

If a frame is already selected, clicking on it while holding down the Ctrl key will remove it from the list of selected frames.

To deselect all frames, click on the canvas (the area outside the ruler is generally the easiest place to do this).

Marquee selection
To select all the frames within a region, move the mouse to where there are no frames, just exposed canvas (moving outside the canvas area is often the easiest way to get to a 'clear space').
Press the left mouse button and drag the mouse. As you drag, a 'marquee selection' will be drawn: a rectangle that selects every frame that it touches. When you have touched all the frames you want to select with the marquee, release the mouse button. All the items within the marquee have been selected.

Select All
To select all like-frames a page collage, either

•	Click the 'select all' button o the toolbar, or

 
If no frames are selected, then only image frames will be selected.
If a frame is preselected (eg. a text frame) then all text frames on the page will be selected.

If all like-items on a page are selected, all remaining non-selected items will be added to the selection.

Selection By Type
It will frequently be useful to select all objects of a specific type. For example, if you are building a contact sheet it is handy to be able to select all text frames with a single click (for example, to resize all of them interactively).

To do this,

Click on the 'select by type' button
Choose a selection type from the resulting pop-up list

Layer Filtering
FotoFusion allows you to assign objects to layers.
By default, images are dropped on the Collage layer, and text is placed on the Text layer.
 
It is often useful to disable selection in specific layers (so that clicking on objects in that layer will be ignored).

For example, if you have created a semi-transparent text frame in the watermark layer you may wish to disable selection in that layer so that you can work on the collage beneath the watermark without accidentally selecting or moving that watermark.

In this example, frames on the Canvas layer have been protected and thus cannot be selected by the user:

Click here for more detail on layers.