Clean up of caching/enable.md

- Use shorter sentences.
- Use MyST syntax for GUI elements.
- Use Sphinx Design card feature to display screenshots with a caption and target to open a full-size image.
- Redo screenshots for a 740-pixel width viewport

Author: stevepiercy

docs/_static/caching/advanced-caching-heading.png

@@ -1,51 +1,95 @@
 ---
 myst:
   html_meta:
-    "description": "Caching Plone: Enable cache support"
-    "property=og:description": "Enabling caching support for Plone"
-    "property=og:title": "Caching Plone: Enabling support"
-    "keywords": "Plone, deployment, automation, caching"
+    "description": "How to enable cache support in Plone"
+    "property=og:description": "How to enable cache support in Plone"
+    "property=og:title": "How to enable cache support in Plone"
+    "keywords": "Plone, deployment, automation, caching, cache"
 ---
 
 (caching-installation-label)=
 
 # Installation
 
-Caching support is implemented by the package `plone.app.caching`, which is already shipped as a dependency of the *Plone* package, and it should be available on all Plone installations.
+Caching support is implemented by the package `plone.app.caching`.
+It is already installed as a dependency of the [Plone](https://github.com/plone/plone) package.
+It should be available on all Plone installations.
 
-Even though Caching support is available in Plone, it is **not enabled by default**, although it is highly recommended to configure caching for every new Plone site in production.
+Even though cache support is available in Plone, it is **not enabled by default**.
+It is highly recommended to configure caching for every new Plone site in production.
 
-## Enable Caching
 
-Under the Advanced header, look for the `Caching` control panel -- currently only supported on the Classic UI -- and select it.
+## Enable caching
 
-```{image} /_static/caching/ControlPanel-01.png
-:alt: Plone Control Panel (Classic UI)
+Enabling of caching is currently only supported in the Classic UI.
+
+As an administrator, navigate to {guilabel}`Site Setup`.
+Under the {guilabel}`Advanced` heading or navigation item, select the <img alt="Caching" src="/_static/caching/icon-caching.svg" class="inline"> {guilabel}`Caching` control panel.
+
+````{card}
+```{image} /_static/caching/advanced-caching-navigation.png
+:alt: Plone Classic UI Caching Control Panel in the navigation
+:target: /_static/caching/advanced-caching-navigation.png
+```
++++
+_Caching Control Panel in the navigation_
+````
+
+````{card}
+```{image} /_static/caching/advanced-caching-heading.png
+:alt: Plone Classic UI Caching Control Panel under a heading
+:target: /_static/caching/advanced-caching-heading.png
 ```
++++
+_Caching Control Panel under a heading_
+````
 
-In the Caching control panel, the tab `Change settings` is selected and inside of it the tab `Global settings` have the option to **Enable caching** (disable by default)
+In the Caching control panel, the tab {guilabel}`Change settings` is selected by default.
+Inside of it, the tab {guilabel}`Global settings` has the option to {guilabel}`Enable caching`.
+This setting is disabled by default.
 
-```{image} /_static/caching/ControlPanel-02.png
+````{card}
+```{image} /_static/caching/caching-disabled.png
 :alt: Caching Control Panel with caching disabled
+:target: /_static/caching/caching-disabled.png
 ```
++++
+_Caching Control Panel with caching disabled_
+````
 
-To enable caching, click the checkbox:
+To enable caching, click the checkbox, and click the {guilabel}`Save` button.
 
-```{image} /_static/caching/ControlPanel-03.png
+````{card}
+```{image} /_static/caching/caching-enabled.png
 :alt: Caching Control Panel with caching enabled
+:target: /_static/caching/caching-enabled.png
 ```
++++
+_Caching Control Panel with caching enabled_
+````
+
 
 ## Troubleshooting
 
-When the Caching control panel is not there, there can be various reasons for this:
+When the caching control panel is not there, there can be various reasons for this:
 
-- If your installation does not load the `Plone` package, but only `Products.CMFPlone`, then `plone.app.caching` is not included.
-- If the package *is* included, but you add a Plone Site using the advanced form and disable caching, then the control panel is not there.
+-   If your installation does not load the `Plone` package, but only `Products.CMFPlone`, then `plone.app.caching` is not included.
+-   If the package *is* included, but you add a Plone Site using the advanced form and disable caching, then the control panel is not there.
 
 If you want to install it in an existing Plone Site:
 
-1. Make sure the package is available in the Plone instance, by adding `plone.app.caching` or `Plone` to your installation.
-2. From the Plone Site Setup go to the ZMI (Zope Management Interface).
-3. Go to ``portal_setup``, and then to the Import tab.
-4. Select the HTTP caching support profile, perhaps easiest by id: `profile-plone.app.caching:default`.
-5. Click 'Import all steps'.
+1.  Make sure the package is available in the Plone instance by adding `plone.app.caching` or `Plone` to your installation.
+2.  From the Plone Site Setup, under the {guilabel}`Advanced` heading or navigation item, select the <img alt="Management Interface" src="/_static/caching/icon-management-interface.svg" class="inline"> {guilabel}`Management Interface` control panel.
+3.  Click {guilabel}`portal_setup`, and then click the {guilabel}`Import` tab.
+4.  Select the profile by title {guilabel}`HTTP caching support`, or by id {guilabel}`profile-plone.app.caching:default`.
+5.  Select {guilabel}`Apply new profiles. Run upgrade steps for already applied profiles. Recommended.`.
+6.  Click the {guilabel}`Import all steps` button.
+
+````{card}
+```{image} /_static/caching/caching-import-configuration.png
+:alt: Site Configuration Full Import for HTTP caching support
+:target: /_static/caching/caching-import-configuration.png
+```
++++
+_Site Configuration Full Import for HTTP caching support_
+````