カラー形式によって文字や線の単位を自動で切り替えてくれる、もしくは予めいくつか設定を保存しているものに切り替えるという機能が欲しいです。
DTPとWebデザイン両方をIllustratorで行う場合、DTPはミリメートル、Webはピクセルと単位が異なるため、その都度環境設定から単位を変更するのが若干手間だと感じています。

例えばアートボードのカラー形式によって単位を変更する機能があるととても便利です
（CMYKに設定すればミリメートル、RGBならピクセルになるという風に）
ご検討のほどよろしくお願い致します。

The Open PDF window box that comes up when you try to open a Multi-Page PDF should have a larger preview. In the Open PDF window much of the text can be garbled, which doesn't help if you are not sure which page of a 49 page document you need to open.

When creating a user interface at my job in illustrator, aligning text and iconography is very important. It would be awesome if I were able to create a bunch of live text, create outlines of this text, and move and align text all over the art board then somehow, UN-OUTLINE all the text and make all the text that you aligned to be re-editable and live text.

This would be phenomenally useful.

Give users more flexibility with the program interface please. This will help alot of people with eye strain.

Current graph tool in Illustrator has many limitations that need fixing. Following are some of the problems in Graph tool:

No value labels

Data window that requires you to remove characters such as commas

Resetting of chart upon making changes

Resizing issues (e.g. with bounding box)

Missing basic chart types like *****

No support for templates

Also the tool doesn't support making new chart types, such as attaching data to any attribute of the artwork.

Add a view mode that shows only artwork on the artboards, like in InDesign. Where I don't see the bleed and the artwork on it.

There should be a way to set default fonts for all language inputs. I use traditional chinese in a lot of my work but the default font uses japanese Kanji, which doesn't hold all the traditional chinese characters, making it difficult for me to change every time.

最近使用したもの一覧はインターフェースとして便利ですが、同一ファイル名を使用したりするケースでは判別がつかず、ファイル管理上、危険が伴うので、ファイルパスを表示するなど、どこかにユニーク情報を入れてほしい。

Please introduce Undo panel to Adobe Illustrator, listing all the steps that have been performed on a document during the current session, so one can quickly switch between any previous state and current state after testing a number of changes by clicking any item in the displayed Undo stack.

See this Adobe Forums thread for details:

https://forums.adobe.com/message/9801291

It's by far the thing that annoys me the most about Illustrator;
when you have your point text already positioned you need it to be aligned to a side and when you press the "align" button in the paragraph options the text moves and aligns to its previous center.
It's a complete time-waster!

The Pathfinder window contains the ever useful 'Unite' - the menu option of Pathfinder does not (I would like to be able to create a custom keyboard command for the Unite feature).

Thanks! and I just want to say that I've been using Illustrator since 1990. Love ya!

This really goes for any Adobe program but the programs always pop to the top of all of my windows which drives me crazy. I hate when I'm trying to multi-task only to have the Progress window pop up in the middle of my view. Or worse when the program Window itself jumps to the front. I use this software in a professional setting so I'm always working on something else when my files are loading. Please stop forcing the program and progress bars to the front of all open windows.

1 inch bleed limit may seem extreme for offset (usually 1/8") or packaging (1/4"), but people use Illustrator for all kinds of projects! Textile vendors want much more. The limit makes proofing annoying because we need to get approvals without bleed.

When working with multiple artboards, it would be very helpful to have artboard-specific layers displayed on the Layers panel as opposed to one long blob of all layers from all artboards.

We can do this to more control shadow to be like Photoshop
Thank you for reading.
I want your program to be better than any program (affinity designer)