diff --git a/kernel/api/filetree.go b/kernel/api/filetree.go
index 4c43db32b..221c23b1b 100644
--- a/kernel/api/filetree.go
+++ b/kernel/api/filetree.go
@@ -710,7 +710,7 @@ func getDoc(c *gin.Context) {
 	if nil != startIDArg && nil != endIDArg {
 		startID = startIDArg.(string)
 		endID = endIDArg.(string)
-		size = 36
+		size = model.Conf.Editor.DynamicLoadBlocks
 	}
 	isBacklinkArg := arg["isBacklink"]
 	isBacklink := false