Text Prompts

ComfyUI Provides a variety of ways to finetune your prompts to better reflect your intention.

up and down weighting

The importance of parts of the prompt can be up or down-weighted by enclosing the specified part of the prompt in brackets using the following syntax: (prompt:weight). E.g. if we have a prompt flowers inside a blue vase and we want the diffusion model to empathize the flowers we could try reformulating our prompt into: (flowers:1.2) inside a blue vase. Nested loops multiply the weights inside them, e.g. in the prompt ((flowers:1.2):.5) inside a blue vase flowers end up with a weight of 0.6. Using only brackets without specifying a weight is shorthand for (prompt:1.1), e.g. (flower) is equal to (flower:1.1). To use brackets inside a prompt they have to be escaped, e.g. \(1990\). ComfyUI can also add the appropriate weighting syntax for a selected part of the prompt via the keybinds ++ctrl+arrow-up++ and ++ctrl+arrow-down++. The amount by which these shortcuts up or down-weight can be adjusted in the settings.

using textual inversion embeddings

Textual inversions are custom made CLIP embeddings that embody certain concepts. Textual inversions can be referenced inside a prompt by use the following syntax: embedding:name where name is the name of the embedding file.

adding random choices

It is possible to let ComfyUI choose random parts of a prompt when it is queued up using the following syntax {choice1|choice2|...}. E.g. if we want ComfyUI to randomly select one of a set of colors we can add the following to our prompt: {red|blue|yellow|green}.