diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index 5792889cfa6..a5ad75f9f1f 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -1232,3 +1232,4 @@ UploadFileDragDropSuccess=The file(s) have been uploaded successfully
 SearchSyntaxTooltipForStringOrNum=For searching inside text fields, you can use the characters ^ or $ to make a 'start or end with' search or use the ! to make a 'does not contain' test. You can use the | between two strings instead of a space for a 'OR' condition instead of 'AND'. For numeric values, you can use the operator <, >, <=, >= or != before the value, to filter using a mathematical comparison
 InProgress=In progress
 DateOfPrinting=Date of printing
+ClickFullScreenEscapeToLeave=Click here to swith in Full screen mode. Type ESCAPE to leave Full screen mode.
\ No newline at end of file
diff --git a/htdocs/takepos/index.php b/htdocs/takepos/index.php
index c3f4b63d85f..7e3663b2cc6 100644
--- a/htdocs/takepos/index.php
+++ b/htdocs/takepos/index.php
@@ -1070,7 +1070,7 @@ if (empty($conf->global->TAKEPOS_HIDE_HEAD_BAR)) {
 					<a href="<?php echo DOL_URL_ROOT.'/'; ?>" target="backoffice" rel="opener"><!-- we need rel="opener" here, we are on same domain and we need to be able to reuse this tab several times -->
 					<span class="fas fa-home"></span></a>
 					<?php if (empty($conf->dol_use_jmobile)) {?>
-						<a class="hideonsmartphone" onclick="FullScreen();"><span class="fa fa-expand-arrows-alt"></span></a>
+						<a class="hideonsmartphone" onclick="FullScreen();" title="<?php echo dol_escape_htmltag($langs->trans("ClickFullScreenEscapeToLeave")); ?>"><span class="fa fa-expand-arrows-alt"></span></a>
 					<?php }?>
 					</div>
 					<?php