# How to reverse smartblind position scaling from 0-100% to 100-0% **URL:** \ **Category:** Questions & Help\ **Created:** [September 4, 2024, 10:25pm UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523 "2024-09-04T22:25:01Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![David\_Webster](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/david_webster/32/113683_2.png) [@David\_Webster](https://community.homey.app/u/David_Webster)\ **Post date:** [September 4, 2024, 10:25pm UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523/1 "2024-09-04T22:25:02Z")
I have add Ikea Fyrtur blinds via Matter to Homey Pro and find that they are scaled so that 0%=Open and 100%=Closed. My other blinds ae Z-Wave and scale the other way round, i.e. 0%=Closed and 100%=Open. For consistent Alexa voice commands of position for all blinds, I want to reverse the scaling of the Fyrtur blinds, so they are same as my Z-Wave blinds How can I achieve this? ---
**Author:** ![Rmb](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rmb/32/79135_2.png) [@Rmb](https://community.homey.app/u/Rmb)\ **Post date:** [September 4, 2024, 10:33pm UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523/2 "2024-09-04T22:33:18Z")
If you want 40% open, you recalculate to (100-40)=60% In general: if you want x% open, you recalculate (100-x)%, so when x=0 the result is 100 and when x=100 the result is 0. ---
**Author:** ![Caseda](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/caseda/32/138695_2.png) [@Caseda](https://community.homey.app/u/Caseda)\ **Post date:** [September 5, 2024, 7:41am UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523/3 "2024-09-05T07:41:45Z")
Is there no “invert” option in the advanced settings of the device? ---
**Author:** ![DirkH](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dirkh/32/78952_2.png) [@DirkH](https://community.homey.app/u/DirkH)\ **Post date:** [September 5, 2024, 11:57am UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523/5 "2024-09-05T11:57:25Z")
Hi David, I am not very familiar with [VIRTUAL DEVICES App](https://homey.app/en-de/app/com.arjankranenburg.virtual/), but I guess you can link a virtual device to one of your blinds and link the properties in a way that the recalculation is done automatically. Probably also [Device Capabilities](https://homey.app/en-de/app/nl.qluster-it.DeviceCapabilities/), but I don’t know that at all. ---
**Author:** ![David\_Webster](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/david_webster/32/113683_2.png) [@David\_Webster](https://community.homey.app/u/David_Webster)\ **Post date:** [September 5, 2024, 3:00pm UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523/6 "2024-09-05T15:00:28Z")
Sadly no invert available ---
**Author:** ![David\_Webster](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/david_webster/32/113683_2.png) [@David\_Webster](https://community.homey.app/u/David_Webster)\ **Post date:** [September 5, 2024, 3:24pm UTC](https://community.homey.app/t/how-to-reverse-smartblind-position-scaling-from-0-100-to-100-0/115523/7 "2024-09-05T15:24:05Z")
Thanks Dirk. I think that using a virtual blind , if that can be controlled by Alexa, might then be used to set the physical blind using the calculation suggested by Rmb and jhoney12. I have started to experiment with the Logic Card for Calculate, but it’s use is new to me and there is much to learn.