Prototyping Tool for Drag & Drop interaction

Is there any good prototyping tool for building up mockup with drag and drop interaction?
Because it seems like most prototyping tools only allow linking to other pages/screens, while I would like to mimic a drag and drop f…
What is best to maximize usability: a fixed aside nav or a top fixed nav?

Many websites have fixed menus on the top of the screen so the user doesn’t feel lost in long pages that require lots of scrolling. But usually this kind of menu is just a rectangle with text. What if you use a fixed aside ar…
how to declutter interface and save functionality?

I have an open-source file uploading desktop app. At some point there is a step, where user needs to choose description fields for files he’s about to upload. He needs to have three choices:
Yes (I need that field)
No (I do…
Multi-organization app – switching organization context wording?

I have a multi-organizational app and I want to give user’s the ability to switch the context (which would load different data) between the various organizations that they are a member of.
What’s the appropriate wording? Cur…
Mobile equivalent of tabs?

I have the following example app for desktop:
Here’s the mobile equivalent:
As you can see, on mobile I’ve converted the tabs here to a standard dropdown control. On the phone when you select it you get the rotating “dr…
What are ‘affordances’ in design? [duplicate]
![What are 'affordances' in design? [duplicate]](https://uxsharelab.com/wp-content/themes/proxima/images/thumbnail-placeholder.gif)
This question already has an answer here:
How broad is the definition of affordance?
5 answers
And can you give examples of h…
What symbol conveys "save"?

I have a text input field where the user enters an address. I am adding the ability to save the address to an address book. What should the icon look like to save? This is for smartphones so space is limited.
download …
UX and Information Security of pre-login account information

I’m currently working on a redesign of a customer-facing account management. A stakeholder brought forth the idea of exposing certain information about the account to pre-login UI. From a technical perspective it’s doable (vi…