Clarifies a bit of the explanation on the login page.

app/src/main/java/com/keylesspalace/tusky/LoginActivity.java

@@ -58,7 +58,7 @@ public class LoginActivity extends AppCompatActivity {
 
     @BindView(R.id.edit_text_domain) EditText editText;
     @BindView(R.id.button_login) Button button;
-    @BindView(R.id.no_account) TextView noAccount;
+    @BindView(R.id.whats_an_instance) TextView whatsAnInstance;
 
     private static String urlEncode(String string) {
         try {
@@ -208,11 +208,11 @@ public class LoginActivity extends AppCompatActivity {
 
         final Context context = this;
 
-        noAccount.setOnClickListener(new View.OnClickListener() {
+        whatsAnInstance.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 AlertDialog dialog = new AlertDialog.Builder(context)
-                        .setMessage(R.string.dialog_no_account)
+                        .setMessage(R.string.dialog_whats_an_instance)
                         .setPositiveButton(R.string.action_close,
                                 new DialogInterface.OnClickListener() {
                                     @Override

app/src/main/res/layout/activity_login.xml

@@ -49,8 +49,10 @@
         <TextView
             android:layout_width="250dp"
             android:layout_height="wrap_content"
+            android:paddingTop="5dp"
             android:textAlignment="center"
-            android:id="@+id/no_account"
-            android:text="@string/link_no_account" />
+            android:id="@+id/whats_an_instance"
+            android:text="@string/link_whats_an_instance" />
+
     </LinearLayout>
 </ScrollView>

app/src/main/res/values/strings.xml

@@ -86,13 +86,16 @@
     <string name="hint_compose">What\'s happening?</string>
     <string name="hint_content_warning">Content warning</string>
 
-    <string name="link_no_account">No account?</string>
+    <string name="link_whats_an_instance">What\'s an instance?</string>
 
-    <string name="dialog_no_account">
-        Similar to an email address, a Mastodon account can be provided by any one of many
-        websites.\n\nSo the address of any instance can be entered here, which will direct you
-        there to either make an account or log in.\n\nMore can be found at
-        <a href="https://mastodon.social/about">mastodon.social</a>.
+    <string name="dialog_whats_an_instance">The address or domain of any instance can be entered
+        here, such as mastodon.social, icosahedron.website, social.tchncs.de, and
+        <a href="https://github.com/tootsuite/mastodon/blob/master/docs/Using-Mastodon/List-of-Mastodon-instances.md">more!</a>
+        \n\nIf you don\'t yet have an account, you can enter the name of the instance you\'d like to
+        join and create an account there.\n\nAn instance is a single place where your account is
+        hosted, but you can easily communicate with and follow folks on other instances as though
+        you were on the same site.
+        \n\nMore info can be found at <a href="https://mastodon.social/about">mastodon.social</a>.
     </string>
     <string name="dialog_title_finishing_media_upload">Finishing Media Upload</string>
     <string name="dialog_message_uploading_media">Uploading…</string>