diff --git a/packages/explorer-views/src/components/rdf-term.tsx b/packages/explorer-views/src/components/rdf-term.tsx
index a64705a..0e4ea7e 100644
--- a/packages/explorer-views/src/components/rdf-term.tsx
+++ b/packages/explorer-views/src/components/rdf-term.tsx
@@ -207,7 +207,7 @@ function renderCompactedIRI(iri: IRIOrBlankNode, context: RenderContext, options
             {options.linkContents || <>
                 {prefixedName.prefixLabel.length ? <span class="rdf-iri-prefixlabel">{prefixedName.prefixLabel}</span> : null}
                 <span class="rdf-iri-colon">:</span>
-                {prefixedName.localName.length ? <span class="rdf-iri-localname">{Ix.from<HtmlContent>(prefixedName.localName.split(/(?<=[^A-Z])(?=[A-Z])/)).intersperse(<wbr />)}</span> : null}
+                {prefixedName.localName.length ? <span class="rdf-iri-localname">{Ix.from<HtmlContent>(prefixedName.localName.split(/(?<=[^A-Z])(?=[A-Z])/)).intersperse(<> </>)}</span> : null}
             </>}
         </a>;
     }
diff --git a/packages/explorer-views/src/components/tabview.css b/packages/explorer-views/src/components/tabview.css
index a5bb4df..8ae0b77 100644
--- a/packages/explorer-views/src/components/tabview.css
+++ b/packages/explorer-views/src/components/tabview.css
@@ -21,6 +21,10 @@
             text-decoration: underline;
         }
 
+        .tabview .tabview-tabs label:last-of-type {
+            margin-right: 0;
+        }
+
     .tabview .tabview-pages > * {
         display: none;
         margin: 0;
diff --git a/packages/explorer-views/src/components/treeview.css b/packages/explorer-views/src/components/treeview.css
index 5c8b074..33daf27 100644
--- a/packages/explorer-views/src/components/treeview.css
+++ b/packages/explorer-views/src/components/treeview.css
@@ -77,4 +77,6 @@
 
     .tree a {
         display: inline-block;
+        white-space: nowrap;
+        margin-right: .5em;
     }
diff --git a/packages/explorer-views/src/pages/navigation.css b/packages/explorer-views/src/pages/navigation.css
index 789e20a..266a6b1 100644
--- a/packages/explorer-views/src/pages/navigation.css
+++ b/packages/explorer-views/src/pages/navigation.css
@@ -26,7 +26,7 @@ nav {
         background: var(--base01);
         border: 1px solid var(--base02);
         padding: 1.5rem .5rem 5rem;
-        overflow: clip auto;
+        overflow: auto;
         overscroll-behavior: none;
     }
 
diff --git a/packages/explorer/src/main.ts b/packages/explorer/src/main.ts
index 1ede954..28cd0d0 100644
--- a/packages/explorer/src/main.ts
+++ b/packages/explorer/src/main.ts
@@ -68,14 +68,20 @@ else {
     dialog.showModal();
 
     function setLayoutsSize(clientX: number) { // eslint-disable-line no-inner-declarations
-        const width = Math.min(Math.max(clientX - 4, window.innerWidth * 0.15), window.innerWidth * 0.85) + "px";
+        const minWidth = 359; // to accommodate at least the main 4 tabs (Classes, Properties, Ontologies and Files)
 
-        navigationDivider.style.left = width;
-        navigationPane.style.width = width;
-        mainContent.style.marginLeft = width;
+        let width = Math.min(Math.max(clientX - 4, window.innerWidth * 0.15), window.innerWidth * 0.85);
+
+        if (width < minWidth) {
+            width = minWidth;
+        }
+
+        navigationDivider.style.left = width + "px";
+        navigationPane.style.width = width + "px";
+        mainContent.style.marginLeft = width + "px";
 
         if (window.localStorage) {
-            window.localStorage.setItem(navWidthStorageKey, width);
+            window.localStorage.setItem(navWidthStorageKey, width + "px");
         }
     }
 
@@ -269,9 +275,7 @@ else {
 
         if (window.localStorage) {
             const navWidth = Number.parseInt(window.localStorage.getItem(navWidthStorageKey) || "");
-            if (!Number.isNaN(navWidth)) {
-                setLayoutsSize(navWidth);
-            }
+            setLayoutsSize(navWidth || 0);
         }
 
         progress.className = "progress-bar loading";