diff --git a/javascript/extraNetworks.js b/javascript/extraNetworks.js
index a787372cff3..98a7abb745c 100644
--- a/javascript/extraNetworks.js
+++ b/javascript/extraNetworks.js
@@ -392,3 +392,9 @@ function extraNetworksRefreshSingleCard(page, tabname, name) {
         }
     });
 }
+
+window.addEventListener("keydown", function(event) {
+    if (event.key == "Escape") {
+        closePopup();
+    }
+});
diff --git a/style.css b/style.css
index 6e3ca84113e..ee39a57b73e 100644
--- a/style.css
+++ b/style.css
@@ -646,6 +646,8 @@ table.popup-table .link{
     margin: auto;
     padding: 2em;
     z-index: 1001;
+    max-height: 90%;
+    max-width: 90%;
 }
 
 /* fullpage image viewer */