Updated ReadMe to mention Word Entry Form locking/unlocking.

Updated Announcement.

README.md

@@ -10,6 +10,7 @@ If you would like an added layer of accessibility and security (in case you clea
 ## Table of Contents
 * [How do I use Lexiconga?](#how-do-i-use-lexiconga)
   * [Getting Started](#getting-started)
+  * [Locking/Unlocking the Word Entry Form](#locking-unlocking-the-word-entry-form)
   * [Viewing your Dictionary's Description/Rules](#viewing-your-dictionary-s-description-rules)
   * [Entry Management](#entry-management)
   * [The Settings Menu](#the-settings-menu)
@@ -39,6 +40,9 @@ The only things to remember while adding new words is that the minimum informati
 
 And that's all you need to get started! Everything else should be pretty self-explanatory, but a full explanation of Dictionary Builder and all of its functions continues below.
 
+### Locking/Unlocking the Word Entry Form
+If you are not viewing Lexiconga from a mobile device, you will see a lock icon (🔒) in a button in the top right corner of the word entry form. If you click the button, the word entry form will be undocked from the top of the dictionary and will scroll down the page with you. If you click the unlocked icon (🔓) after the form has been unlocked, it will lock again and jump back to the top of the page.
+
 ### Viewing your Dictionary's Description/Rules
 After you enter a markdown-formatted description/rules in the Settings menu, you can view the formatted version by clicking the "Show Description" button under your dictionary's name. You can hide it again by clicking "Hide Description" when the description is displayed.
 

announcement.php

@@ -0,0 +1 @@
+You can now unlock the Word Entry Form so it scrolls next to the dictionary as you scroll. No need to scramble up and down the screen to add words!