FILEMAKER WEBDIRECT has a lot of positive features, and does a great job of bringing the FileMaker interface and functionality to a web browser. However, there are some little quirks that require workarounds. Seedcode shares a workaround that helps hide objects and reduce screen flashing:
If you’ve been building layouts for WebDirect you’ve likely seen that WebDirect may draw your objects before conditional formatting or hiding are applied. This never happens in the desktop, where rendering is now double buffered on both Mac and Windows, but it happens frequently in WebDirect. The video below shows this in action and suggests one technique to make it less obvious.
There’s a short video at the link that is well worth watching.