If I understand you correctly, you mean the part where you can compare keywords for demand and competition?
To get this, all you need to do is this:
1. Click Create a New Research Project and type in the product you are interested in, e.g. Shoe Horns.
2. The Research Lab will come back with the demand/competition for this seed keyword, plus it will give you a list of related keywords.
3. To compare these, just click one and select Add this Keyword.
4. The keyword will appear at the bottom of your screen. You can add up to 5 different keywords and compare demand and supply side by side.
wood shoe horn
metal shoe horn
long shoe horn
Hope that answers your question! If you need anything else, please don't hesitate to ask :)