This is absolutely crucial. Having the ability to access UI elements within the design document would be a game-changer. The window juggling must come to an end. :)

This is basically what balsamiq is awesome for

It would be great if there was an online library of pre-built elements eg sliders, buttons, forms etc. A bit like Axure has.

Id be great to get fontawesome icons and such also.

I see that this feature has been started, that's great. Just wanted to pile on a little here though.

I think Chris hit the nail on the head about where this should ideally fit into a modern workflow. I don't think Adobe needs yet another design tool, but there is a big gap in the product line with functionality that can rapidly create low-fi designs and then transition into more detailed prototyping. In a perfect world, it would function much like UxPin (but less buggy) and tightly integrated into rest of the Adobe ecosystem. My 2 cents.

Have a way for library elements/components be shared to others within your team/group so they group/team can connect to these elements/components to build quicker.

A project specific library would be very helpful too. Master elements (like .Indd mast pages) such as menus (with pre-linked nav?) would be super helpful.

Built-in Library of ICONS for Google Material design, iOS & Window

I mean an UI library.

Please, add the most commont UI elements into this already awesome application OR/AND perfect AI copy/paste support for vector based elements.

Basically still in beta mode. As soon as it has the capability to import already designed UI kit packages. Also needs to allow link to anchor/section with ease for the single page options. The bonus of XD is that you can design, prototype, and record from one app without having it look like too much of a wireframe.

If it helps we would like to show a link to a plug-CRAFT (library)
https://labs.invisionapp.com/craft

I agree with this, there was another idea like this back in march that was marked as completed, due to a misunderstanding. I've never used sketch personally, but I just watched this video, and at 3:06 - 3:35 they're using the exact feature in Sketch that we're looking for: https://youtu.be/gA_hFHkhqFM?t=3m6s . I hope that this video is useful for any devs.

This feature is the current deal breaker in our organization.

I often design for other desktop systems. I would like to see Ubuntu, Windows Classic & Windows Aero Libraries, Along with OSX Yosemite & Windows 10 elements mentioned above.

Will be possible to have a set of icons already available? Instead of create and import many icons. For example take some basic icon already created by Adobe or Font awesome from XD directly.

I like Xd but i don't know why. Other programs can do what Xd does! Please explain to a stupid Photoshop, InDesign, Illustrator user.

I agree with everyone's comments. There needs to be a few UI Libraries to choose from as well as the ability to create your own.

I was really expecting this to be a feature of this app - or at least in the works. I find it frustrating that some highly promoted prototyping tools (Invision, origami, etc.) are heavily focused on having a fairly polished design. When you need to get to a prototype fast not having to build every element is key. I love that this is part of the Cloud and could be a prototyping tool that a team could use without having to pay for another monthly fee or big upfront license. But if its not quick to drag and drop elements and add some interactions, then I would have to agree with some other comments that this is just another design tool.

Hi, I'm a designer ant I work with UI and UX to mobile.

It is the great tool to UI prototype and to integrate designer with programmers to app dev.
In my opinion the UI guide could have the option to choose when the user start a new project, this would be easier if we wanted to make a quick prototype and show the dev team.
I'm really enjoing to using this tool. About the UI guide, could insert a new navigation tab.