With a click of a button on your Workbench, you can add to the existing stacks of all the chests connected to that Workbench at once.
Permissions and credits
Credits and distribution permission
Other user's assetsAll the assets in this file belong to the author, or are from free-to-use modder's resources
Upload permissionYou are not allowed to upload this file to other sites under any circumstances
Modification permissionYou are allowed to modify my files and release bug fixes or improve on the features without permission from or credit to me
Conversion permissionYou are not allowed to convert this file to work on other games under any circumstances
Asset use permissionYou are allowed to use the assets in this file without permission as long as you credit me
Asset use permission in mods/files that are being soldYou are not allowed to use assets from this file in any mods/files that are being sold, for money, on Steam Workshop or other platforms
Asset use permission in mods/files that earn donation pointsYou are allowed to earn Donation Points for your mods if they use my assets
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Changelogs
Version 1.0.0
First public release.
Okay, disclaimer. I was gonna make a super nice gif to upload like I did for my Add To Fridges mod, but then ShareX decided it didn't want to play nice. All I can say is, last time I tested this (which was literally an hour ago as of writing this when I was trying to make the gif) it worked, and also it's basically the same mod as Add To Fridges but made to work on the workbench, and Add To Fridges has been up for a couple months without any problems.
Download this mod and unzip it into Stardew Valley/Mods.
Run the game using SMAPI.
How to use Access the workbench with the connected chests and there will be a button on the bottom right of the UI. Items will only transfer if there are 1 or more chests connected to the workbench.
Also there's a config file. If you set the colored chests icon to false the chests on the icon will all be the same shade of brown rather than multicolored. Wow.
Compatibility
Works with Stardew Valley 1.4.5 on Windows. Unknown capability for other platforms/mobile. Let me know if there are issues and I'll see what I can do.
Works in single player and should work in multiplayer as well.
Not tested for compatibility with other mods that alter the Workbench UI. If conflicts exist, let me know and I'll see what I can do.