add docusaurus, convert notes/tips, ids

docs/feature_layers.md

@@ -1,10 +1,10 @@
-# Layers :id=layers
+# Layers {#layers}
 
 One of the most powerful and well used features of QMK Firmware is the ability to use layers.  For most people, this amounts to a function key that allows for different keys, much like what you would see on a laptop or tablet keyboard.
 
 For a detailed explanation of how the layer stack works, checkout [Keymap Overview](keymap.md#keymap-and-layers).
 
-## Switching and Toggling Layers :id=switching-and-toggling-layers
+## Switching and Toggling Layers {#switching-and-toggling-layers}
 
 These functions allow you to activate layers in various ways. Note that layers are not generally independent layouts -- multiple layers can be activated at once, and it's typical for layers to use `KC_TRNS` to allow keypresses to pass through to lower layers. When using momentary layer switching with MO(), LM(), TT(), or LT(), make sure to leave the key on the above layers transparent or it may not work as intended.
 
@@ -17,7 +17,7 @@ These functions allow you to activate layers in various ways. Note that layers a
 * `TO(layer)` - activates *layer* and de-activates all other layers (except your default layer). This function is special, because instead of just adding/removing one layer to your active layer stack, it will completely replace your current active layers, uniquely allowing you to replace higher layers with a lower one. This is activated on keydown (as soon as the key is pressed).
 * `TT(layer)` - Layer Tap-Toggle. If you hold the key down, *layer* is activated, and then is de-activated when you let go (like `MO`). If you repeatedly tap it, the layer will be toggled on or off (like `TG`). It needs 5 taps by default, but you can change this by defining `TAPPING_TOGGLE` -- for example, `#define TAPPING_TOGGLE 2` to toggle on just two taps.
 
-### Caveats :id=caveats
+### Caveats {#caveats}
 
 Currently, the `layer` argument of `LT()` is limited to layers 0-15, and the `kc` argument to the [Basic Keycode set](keycodes_basic.md), meaning you can't use keycodes like `LCTL()`, `KC_TILD`, or anything greater than `0xFF`. This is because QMK uses 16-bit keycodes, of which 4 bits are used for the function identifier and 4 bits for the layer, leaving only 8 bits for the keycode.
 
@@ -29,11 +29,11 @@ For a similar reason, the `layer` argument of `LM()` is also limited to layers 0
 
 Expanding this would be complicated, at best. Moving to a 32-bit keycode would solve a lot of this, but would double the amount of space that the keymap matrix uses. And it could potentially cause issues, too. If you need to apply modifiers to your tapped keycode, [Tap Dance](feature_tap_dance.md#example-5-using-tap-dance-for-advanced-mod-tap-and-layer-tap-keys) can be used to accomplish this.
 
-## Working with Layers :id=working-with-layers
+## Working with Layers {#working-with-layers}
 
 Care must be taken when switching layers, it's possible to lock yourself into a layer with no way to deactivate that layer (without unplugging your keyboard.) We've created some guidelines to help users avoid the most common problems.
 
-### Beginners :id=beginners
+### Beginners {#beginners}
 
 If you are just getting started with QMK you will want to keep everything simple. Follow these guidelines when setting up your layers:
 
@@ -41,11 +41,11 @@ If you are just getting started with QMK you will want to keep everything simple
 * Arrange your layers in a "tree" layout, with layer 0 as the root. Do not try to enter the same layer from more than one other layer.
 * In a layer's keymap, only reference higher-numbered layers. Because layers are processed from the highest-numbered (topmost) active layer down, modifying the state of lower layers can be tricky and error-prone.
 
-### Intermediate Users :id=intermediate-users
+### Intermediate Users {#intermediate-users}
 
 Sometimes you need more than one base layer. For example, if you want to switch between QWERTY and Dvorak, switch between layouts for different countries, or switch your layout for different videogames. Your base layers should always be the lowest numbered layers. When you have multiple base layers you should always treat them as mutually exclusive. When one base layer is on the others are off.
 
-### Advanced Users :id=advanced-users
+### Advanced Users {#advanced-users}
 
 Once you have a good feel for how layers work and what you can do, you can get more creative. The rules listed in the beginner section will help you be successful by avoiding some of the tricker details but they can be constraining, especially for ultra-compact keyboard users. Understanding how layers work will allow you to use them in more advanced ways.
 
@@ -53,7 +53,7 @@ Layers stack on top of each other in numerical order. When determining what a ke
 
 Sometimes, you might want to switch between layers in a macro or as part of a tap dance routine. `layer_on` activates a layer, and `layer_off` deactivates it. More layer-related functions can be found in [action_layer.h](https://github.com/qmk/qmk_firmware/blob/master/quantum/action_layer.h).
 
-## Functions :id=functions
+## Functions {#functions}
 
 There are a number of functions (and variables) related to how you can use or manipulate the layers.
 
@@ -87,7 +87,11 @@ In addition to the functions that you can call, there are a number of callback f
 | `default_layer_state_set_kb(layer_state_t state)`   | Callback for default layer functions, for keyboard. Called on keyboard initialization. |
 | `default_layer_state_set_user(layer_state_t state)` | Callback for default layer functions, for users. Called on keyboard initialization.    |
 
-?> For additional details on how you can use these callbacks, check out the [Layer Change Code](custom_quantum_functions.md#layer-change-code) document.
+:::tip
+
+For additional details on how you can use these callbacks, check out the [Layer Change Code](custom_quantum_functions.md#layer-change-code) document.
+
+:::
 
 It is also possible to check the state of a particular layer using the following functions and macros.
 
@@ -96,7 +100,7 @@ It is also possible to check the state of a particular layer using the following
 | `layer_state_is(layer)`         | Checks if the specified `layer` is enabled globally.                                            | `IS_LAYER_ON(layer)`, `IS_LAYER_OFF(layer)`                           |
 | `layer_state_cmp(state, layer)` | Checks `state` to see if the specified `layer` is enabled. Intended for use in layer callbacks. | `IS_LAYER_ON_STATE(state, layer)`, `IS_LAYER_OFF_STATE(state, layer)` |
 
-## Layer Change Code :id=layer-change-code
+## Layer Change Code {#layer-change-code}
 
 This runs code every time that the layers get changed.  This can be useful for layer indication, or custom layer handling.