'Highlight' function?

There are lots of ways to highlight something in a Storyline slide. See attached file (here is the published version) shows two variations; one with a Freeform Shape that is made visible ("Normal State") when a button is clicked; the other option uses a shape on a layer. You can play around with Shape effects, like glow, shadow, etc. to get the look you want.  

Hi Rachel,

One way that springs to mind is as follows:

1. Add your buttons to the base layer
2. Create a new layer for each button to display the relevant information
3. On each layer, paste a copy of your resp. system image and crop it to the appropriate section - you can also apply a border and a shadow etc. 
4. Create a "selected" state for your resp. system image and make it black and white
5. On each layer, add a trigger to change the state of [resp. system image] to 'selected' when timeline starts

You should then have something like this (I tried to upload my .story file, but I'm not sure it worked):

 Does this help you?

Regards,

Antony

Of course! Thank you both! This is great - I should have known really - just shows how you can hinder yourself if you get used to doing the same thing over and over!

Thank you guys!

You can simulate a "spotlight" by having a semi-transparent black "mask" with a hole cut out for the hover state with the explanatory words added too.

Bruce

PS - or use Hover state with a "zoomed" image and explanatory text.