Improving user experience on my aggregator website

I’m helping out with a site that aggregates accommodation results from various websites like expedia, airbnb and travelocity to name but a few. As an aggregator it takes time to index the different sites due to different leng…
UI/UX in emergency scenarios

can you recommend resources on good UI/UX design for applications in emergency and/or stressful scenarios? Something similar to this but a little bit more in-depth and with more general recommendations/patterns?
Thanks.
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What patterns could I use for a tree-type menu with up to six levels on mobile devices?

I’m working on the re-design of a web site that displays a large number of highly structured documents that are currently arranged according to a “classification plan” that goes at least six levels deep (I say at least six al…
What’s the symbol for the "locate me" button?

Is there a universally accepted symbol for the button that shows you where you currently are on a map? The google maps app for smartphone has it.
way to show more than 10 roles

Our users have more than 10 roles, they can shift between roles at any time.
Is there any way or design pattern to show > 10 roles on UI?
Below is sample: in image 1 there is a profile dropdown when user opens it all roles will be visible(Image 2) in which i have put all roles.
When user choose one of roles, that selected role’s home screen will displayed.
With this user can do various tasks in various roles, he need not to logout and login every time to perform task in another role.
Image 1:
Image 2:
List Filtering: Techniques

Imagine a nested list. 12 top level “chapters”, each with 24 “sub-sections”, each of which has (for example) 6 to 36 points.
What are the different techniques for providing search filtering into something like this?
Is there a name for smaller text on top of bigger text in typography or UI design?

I have a pattern where important clickable links have smaller text on top of big text to save horizontal space and emphasize the bigger text.
Example:
What do you call the smaller text? I’m just trying to name my CSS clas…
Force users (developers) to remove default styles or add no default styles and look bad

I’m not sure if this question is in bounds, as the users are the developers that will use my plugin.
Example:
I’m creating a simple modal plugin, it has a header, body, and footer area like a lot of other modals. Typically …
Icon for "upgrade"

I’m trying to come up with an icon that would be understood to mean “upgrade” – the user should click on that icon if he wants to upgrade his application/subscription/whatever to a “premium” level.
I’ve searched the web but …