Added format text hint

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -68,6 +68,7 @@ import android.text.style.CharacterStyle;
 import android.text.style.ImageSpan;
 import android.text.style.ParagraphStyle;
 import android.text.style.QuoteSpan;
+import android.text.style.RelativeSizeSpan;
 import android.text.style.URLSpan;
 import android.util.Pair;
 import android.util.TypedValue;
@@ -524,6 +525,14 @@ public class FragmentCompose extends FragmentBase {
 
         setZoom();
 
+        SpannableStringBuilder hint = new SpannableStringBuilder();
+        hint.append(getString(R.string.title_body_hint));
+        hint.append("\n");
+        int pos = hint.length();
+        hint.append(getString(R.string.title_body_hint_style));
+        hint.setSpan(new RelativeSizeSpan(0.7f), pos, hint.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        etBody.setHint(hint);
+
         etBody.setInputContentListener(new EditTextCompose.IInputContentListener() {
             @Override
             public void onInputContent(Uri uri) {

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

@@ -1043,6 +1043,7 @@
     <string name="title_subject">Subject:</string>
     <string name="title_attachment">Attachment:</string>
     <string name="title_body_hint">Your message</string>
+    <string name="title_body_hint_style">You can select text to format it</string>
     <string name="title_discard">Discard</string>
     <string name="title_save">Save</string>
     <string name="title_send">Send</string>