Lightly Modded Vanilla is a simple modpack that refines the presentation of vanilla Minecraft. It seeks to improve both performance and the user experience through the smallest amount of modifications. The result is a game that presents itself in a new light while playing exactly like the original.
(also, sprint/crouch/chat have been rebinded to shift/ctrl/enter (like every other game :) )
Located in:
Pause/Main menu > Options > Video Settings
The setting is labeled as GUI Scale and can be found under the General section.
Located in:
Pause/Main menu > Options > Video Settings
From here, click on the button called "Shader Packs". This is located in the left side-panel.

A simple modpack for playing vanilla Minecraft. Provides performance improvements, a few visual tweaks, and some preconfigured settings.