In this video I’m breaking down Fusion Expressions BASICS inside DaVinci Resolve, and the whole goal is simple: understand what you want to achieve, then let expressions do the work. In Fusion, every parameter has a value, and when you enable an expression (right click a parameter > Expression), whatever you type in the expression box becomes the output that drives that parameter. Fusion expressions are based on Lua and math, but you don’t need to master everything—just learn the core building blocks and you can already start doing real work. First, I show why expressions are powerful: (1) linking parameters so one control can drive multiple things, and (2) animating/automating without keyframes. For linking, I cover three practical methods: typing a parameter name directly (same tool), referencing it via the tool name you see when hovering, or using the little chain/plus icon to drag-link a parameter (pin nodes when you need to link across tools). Then I go into math operations—add/subtract/multiply, sin/cos, abs—and how you can combine numbers and parameters. Finally, I show automation tricks: creating your own custom parameter via Edit Controls (animatable or passive), using time to output the current frame number, using sin(time) / cos(time) for clean looping motion (and how to slow it down), and using iif() to return different values based on a condition. I also share Text+ tips like double quotes for text, “..” to append expressions, and \n for line breaks.