Adding weights to prompts?

What is the suggested way to add weights to prompts in Ultraforge?

Weights are used to either increase or reduce emphasis on a word or phrase.

Different Stable Diffusion applications seem to use different methods to achieve the same effect.

Examples found on the web:

numbers

penguin holding (a beer)1.1

photo:1.1

Numbers between 1 and 2 for positve emphasis.
Numbers between 0 and 0.9 for negative emphasis.

+ / -

penguin holding a beer+
penguin holding a (beer)++
penguin (holding a beer)---

The more + or minus the larger the effect.

(parentheses) and [brackets]

(((photo)))
[[[painting]]]

() is more emphasis
[] is less emphasis

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While experimenting none of these seemed to have an observable effect on the rendered result in Ultraforge.

Questions:

1) Which of these methods are we supposed to use in Ultraforge?

2) When using prompt concatenation are we required to add another node to indicate the weight of the prompt?