diff --git a/capsule-prototype/js/online-script.js b/capsule-prototype/js/online-script.js
index dd0c8a263aa2f9d54a841fcdca65c364d08615b7..b3844ecbe54144573b76e2e28cdfbea1d10c7d81 100644
--- a/capsule-prototype/js/online-script.js
+++ b/capsule-prototype/js/online-script.js
@@ -834,9 +834,11 @@ function openMosaic() {
 	$("#popupMosaicSpace").show();  
     let container = $('#popupMosaicMosaic');
     container.html('');
+    // TODO append filter div
     // TODO is there a better way to iterate over tags or documents ?
     for ( let [k, v] of  Object.entries(rekall.sortings.colors.categories)) {
         let category = $('<div/>').addClass('mosaic_category').css('background', getTagGradientColor(v));
+        // TODO append button on filter div
         for (let i in v.tags){
             category.append(getMosaicItem(v.tags[i]));
         }