What's this?
Have you ever been building that epic structure or map and you find yourself spending so much time swapping out blocks into the 9 slots you have been given? Me too! So with this mod, while holding down left CTRL you will see a preview of all 27 inventory slots. Use your mouse wheel to toggle inventory rows up or down. As you are doing this, you will get a preview of your inventory slots in game. And with the latest version you can also hold down number and switch items in just one column. Cool, huh? 
Compatibility
This mod works in both singleplayer and multiplayer. You only need to install this mod into your client (special mention and thanks to Kobata for helping out with this.). It is also possible to install this mod into your server, and if you do so server will assist in item switching to bypass desyncing issues and also if you install the mod into your server, clients are not required to have the mod installed.
In Minecraft 1.7 left ctrl is the default sprint key. This mod does not register keybindings into Minecraft registry but I check for keypresses manually, which means that you can still use your sprint key while using this mod 
So, how it all got started anyway?
As I have been developing MinecraftEdu, my friend who also is one of MinecraftEdu's educational advisors started asking me for a mod that allows you to very easily switch your inventory row while you are playing. As this was something I also though of being useful, I got excited about making a Forge mod about it and here we are now 
Damn that's a shame I really liked this mod. Does anyone know any good replacements?
Anyone know of any mods that does something similar put is up to date?
In reply to Forge_User_09516861:
Quark has a "Hotbar Changer" feature
http://vazkii.net/subdom/quark/#features
The mod has a lot of features but they're all configurable so You could just disable everything except that feature
EDIT: It's in the "Management" tab
EDIT2: Uh also the Curse Forge link :P
https://www.curseforge.com/minecraft/mc-mods/quark
Any update to newer versions?
1.14.4 support >?
"This mod does not register keybindings into Minecraft registry"
Can you please add this? I use left control to open inventory, have for years since im used to that from other games.
Can you add some lang file to translate for other lang?
For some odd reason when lag strikes my client, if I hold control and scroll, it sometimes duplicates a hotbar and deletes the contents of the previous hotbar...
That's weird. What minecraft version are you using? Are you encountering the problem playing on singleplayer or multiplayer and is the mod installed on the server if you are using it on multiplayer?
I used it on 1.7.10, and it was on SP, with Creative Mode. I haven't had the ability to try it on MP yet.
Would it be possible to add support for Iventory Tweaks so that items no longer "auto fill" down when you scroll through the inventory with Quick Hotbar?
Right now when you have an item selected on your hotbar and you scroll to another bar in your inventory which has an empty spot on the same place you had selected in the previous bar, Inventory Tweaks will pull the item you had selected before into the empty spot.
Is there an option in inventory tweaks mod to prevent this? I haven't gone ahead adding support with other mods really as that has seemed to be quite lot work to get working.
There is. You can set "enableAutoRefill" to false in Inventory Tweaks' config. However that is one of the more useful tweaks that mod adds.
When you are building something with stone blocks, and your stack runs out, it will pull another stack from your inventory into the hotbar spot that just became empty. It does something similar for tools and weapons. When your sword is depleted, it will automatically pull another from your inventory so you can continue fighting without having to dive into your inventory yourself.
Yeah, unfortunately I'm not really sure how to prevent that from happening and no time currently to dedicate to give more throughout look into it :/
OH MY GOD THAT SOUNDS LIKE AN AD
but it is worth getting tho
This looks AMAZING! I just installed it and can't wait to jump into the game and give it a go!
Awesome idea, one thing could you bind this ability to a item like Tinker's Construct belt? Or a Baubles?
Do you mean extra inventory / backpack thingies? If so, integrating into those items started getting bit harder job so had to skip support for those unfortunately :/
Very nice!
I like how the video was like an infomercial. Where do I send the 3 easy payments of $19.99?
:P
What is your policy on redistributing this in modpacks?
Feel free to distribute! :)