I hope these will retain their properties in prototype mode. Great feature, can't wait to use it.

Nested symbols are a must. Symbolized icons/elements inside a larger symbolized component.

Yes, reusable symbols / master objects are great idea.

Also, it would be nice to be able to replace an object (symbol) on the artboard, with another symbol, similar to Illustrator/Flash. Eg to switch states or icons etc.

共通パーツは再利用シンボル/マスターシンボルが近そうです。
https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/12931467-reusable-symbols-master-objects

スクロールの際のヘッダーやグループの固定表示はこの辺りだと。
https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/13031847-sticky-fixed-header-in-scrolling-artboards

これはほしいですね

See also these follow-on requests that add to symbol capabilities:

* Overrides on individual instances of a symbol: https://adobexd.uservoice.com/forums/353007/suggestions/13675224
* Symbols with multiple visual states that they can switch between: https://adobexd.uservoice.com/forums/353007/suggestions/13031871

それ、ほしいね〜
ついでにオンラインで共有する際にヘッダー、ナビゲーション等のスクロールする際に固定する部品があれば、その旨指定できると嬉しいです〜

共通パーツ管理機能
ヘッダー、フッター、ナビゲーション、サイドバー等を一括管理できる機能が欲しいです。
それぞれのパーツからのリンクも一括で管理できた方がよいです。

UXpin is lacking here - their "Smart Elements" instances can't be resized or overridden in any way. Both of these abilities are useful in Balsamiq's Mockups, but that is lacking in presentation ease/polish.

Balsamiq's "Symbol" system is the one to beat, IMO. Being able to selectively override *only* specific master properties I need in a per-instance context is amazingly flexible and powerful.

This is something similar to what I mean http://i.imgur.com/a32RPWd.png

As in illustrator, you should be able to convert an object into a symbol... It would be handy to have a panel with all the symbols you have; and that same planet should have an option to export all your protect symbols to a folder on a determined size in EPS, SVG, AI, PSD and PNG, so that you can open them in any program on any platform.

I totally agree on having object styles or masters. Even though it's easy as copy and paste (in place), it would be nice to have masters applied to new/duplicated artboard

Let's take the situation in your demo - going from a low fidelity design to high fidelity. If I have identified an object as a primary call to action button, having the ability to change the master style once, and have it update all call to action buttons in the prototype, would be a huge time saver. Especially for a large website, it is too cumbersome (and error prone) to have to manually select every single button and reapply the color, corner radius, and typography styling.

I gotta be honest, the way Sketch does symbols is buggy at best. Whatever you do PLEASE do what I assume you will and design it how you think it *should* be, not how the competition is.

@C.L
I love that feature. Although I don't think it's Sketch's own unique feature though. A long time ago when I still used Balsamiq that was the killer feature they had. I think UX Pin has that too.

But I agree, the ability to override the symbol but still maintaining the link to its mothership is really appreciated.

Hi Adobe, Please research the way Symbols are handled in Sketch. Mimicking this method of Symbol handling will yield a gorgeous result in XD. (Hopefully Sketch didn't patent their process)

Basically, with Sketch Symbols, you can create a global Symbol that once edited, displays the changes everywhere its used. That's expected behavior for sure. However, every symbol used also has built in overrides. This is hugely useful as sometimes you do want to change a specific look of a Symbol in your design, without breaking it from being a global Symbol. This may be hard to understand, but check out the demo for more information:
https://www.youtube.com/watch?v=3fcIp5OXtVE

Good luck Adobe. Sketch is quickly chipping away at your business in the UI department because it's a better design tool. However, get Symbols and Type Styles going, and you're almost there!

Their isn't words that express the type of euphoria I will feel if this feature gets released in the next few months.

CAN'T. WAIT.

Super important, I am demoing XD with a current project and entering 40 screen range. Every time I need to make a change or want to clean up UI I have to make changes to every single screen which makes me hesitate from starting new projects using this tool.

I think reusable symbols, groups, masters would save users A LOT of time and is currently the largest barrier for new adopters. I can forgo a lot of other features but this one is needed if I need to have large projects finished on time.

It would help to clone and Artboard to new artboards.

Perhaps by just holding the option Key and clicking on an artboard would cause a clone to appear with all the children objects linked to masters.

This way if you change a master object it changes on all, Such as header and footer details.

If you have a breadcrumb or form-flow steps on the side bar, you could link them up son s each demo proceeds the text line changes to correspond to the title.