diff --git a/data/screenshots/gps_screenshot.png b/data/screenshots/gps_screenshot.png
index 6902744..a4aba78 100644
Binary files a/data/screenshots/gps_screenshot.png and b/data/screenshots/gps_screenshot.png differ
diff --git a/src/graphmanager/graphview.css b/src/graphmanager/graphview.css
index 37d22e6..7618ebb 100644
--- a/src/graphmanager/graphview.css
+++ b/src/graphmanager/graphview.css
@@ -3,6 +3,10 @@
 button.node {
   color: rgb(0, 0, 255);
   background: rgb(170, 255, 170);
+  border-width: 2px;
+  border-style: solid;
+  border-radius: 10px;
+  border-color: rgb(0, 0, 0);
 }
 
 button.node-selected {
@@ -12,6 +16,10 @@ button.node-selected {
 
 button.port {
   color: rgb(0, 0, 255);
+  border-width: 2px;
+  border-style: solid;
+  border-radius: 10px;
+  border-color: rgb(0, 0, 0);
 }
 
 button.port-selected {
@@ -26,6 +34,14 @@ button.port-in {
   background: rgb(170, 170, 255);
 }
 
+button.port-sometimes {
+  border-style: dashed;
+}
+
+button.port-always {
+  border-style: solid;
+}
+
 graphview {
   background: #d0d2d4;
 }
diff --git a/src/graphmanager/port.rs b/src/graphmanager/port.rs
index bf67670..ad10e50 100644
--- a/src/graphmanager/port.rs
+++ b/src/graphmanager/port.rs
@@ -140,6 +140,11 @@ impl Port {
             .presence
             .set(presence)
             .expect("Port presence already set");
+        if presence == PortPresence::Always {
+            port.add_css_class("port-always");
+        } else {
+            port.add_css_class("port-sometimes");
+        }
 
         let label = gtk::Label::new(Some(name));
         label.set_parent(&port);