# Invert button for use when scanning slides

**URL:** <https://forums.negativelabpro.com/t/invert-button-for-use-when-scanning-slides/1582>\
**Category:** Feature Requests\
**Created:** [April 14, 2020, 11:50pm UTC](https://forums.negativelabpro.com/t/invert-button-for-use-when-scanning-slides/1582 "2020-04-14T23:50:14Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![DanM](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DanM](https://forums.negativelabpro.com/u/DanM)\
**Post date:** [April 14, 2020, 11:50pm UTC](https://forums.negativelabpro.com/t/invert-button-for-use-when-scanning-slides/1582/1 "2020-04-14T23:50:14Z")

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I saw it mentioned or asked about on FB. I’ve been camera scanning a lot of slides and tweaking a bit just before NLP, but then I often forget to invert the slide and have to esc invert and then go back into NLP. Would be great to have an invert button in NLP.

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**Author:** ![jlw](https://avatars.discourse-cdn.com/v4/letter/j/e95f7d/32.png) [@jlw](https://forums.negativelabpro.com/u/jlw)\
**Post date:** [April 18, 2020, 1:41am UTC](https://forums.negativelabpro.com/t/invert-button-for-use-when-scanning-slides/1582/2 "2020-04-18T01:41:29Z")

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Could you explain the advantage of running scans of slides (positives) through NLP?

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**Author:** ![DanM](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DanM](https://forums.negativelabpro.com/u/DanM)\
**Post date:** [April 18, 2020, 5:30am UTC](https://forums.negativelabpro.com/t/invert-button-for-use-when-scanning-slides/1582/3 "2020-04-18T05:30:17Z")

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I liked NLP’s color cast, contrast, and tone controls. Sometimes I went in and out of NLP to make adjustments LR, which gave me multiple ways to achieve what I wanted to pull from each slide. I think the NLP camera profile helps a lot too. As for testing, haven’t done exact side-by-sides, but I’ll try one or two when I copy the next batch.

Guess the short answer is, I know what I want from each slide, and NLP usually helps a lot in pulling it out and puts all the controls in one place.

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**Author:** ![jlw](https://avatars.discourse-cdn.com/v4/letter/j/e95f7d/32.png) [@jlw](https://forums.negativelabpro.com/u/jlw)\
**Post date:** [April 18, 2020, 5:43am UTC](https://forums.negativelabpro.com/t/invert-button-for-use-when-scanning-slides/1582/4 "2020-04-18T05:43:19Z")

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So you are scanning the slide, inverting it, and then using NLP to adjust and un-invert it? Just want to make sure I understand what’s going on. I haven’t scanned many slides but may want to try it.