In simple cases, you can edit the Multiparameter and change the Value Mode to "By first parameter".
But, % values are often used when the relationship between the single knob and its target parameter(s) is not a straight-forward one. Take for example, the DBMeld160 Device in MTurboComp. Switch to the Edit screen and select the Followers tab. Find the Attack Multiparameter (MP) on the right-hand side and drag it up and down. Watch how the Attack values in Followers 1 & 3 change. How could you represent that on the Easy screen?
Well, there is a way:
-- have a good look at what that Attack parameter is targetting,
-- add two more MPs to the Compressor Group, immediately following the others,
-- set them to "Meter" behaviour, and "Slider" editor mode,
-- select "Follower 1 Attack" and the target for the first one, and set its range suitably,
-- select "Follower 3 Attack" and the target for the second one, and set its range suitably,
-- when all is done, save it as a Preset (the Devices in the left-hand list cannot be over-written).
Here is one where I have done that for Attack and Release (which also has 2 targets):

To explore this further, copy this code and Paste it onto a spare A..H slot.
Code: Select all
$eNrVXFtz27rVfc+vwDBtp-0SybhfWssdyZIvEytRLOfknLxkaAmWGFOkwksc+6G--RuApESRlOzYTk6rF4e4Lqy99iYAAtn-9-eFD77pKPbCoOOgNnSADibh1AtmHSdNrlrS+ffBi-3hRRpdhofhYhnrJPGCWQxedhzkgJfdJHEn16jjwDaGkEGhMFFilYFNBiKYMMa5QFiucojJgUhKhKASREHqgJd9vUzmto5UBDEKEUeSFRm2isDmR6kgymQchb4f3uiIZHCOXc+OQ3GFCJMUE9PsaWCGqGlWxj4leYU3gdYWvZKEcCoxpDJPtjgUIlRKjvkquVSR2jEIqhiCkinKTMa7pY7cxAsD3HGGXuAtvDtdTiYdZ5xeJpE7ScDf-XD2D5OZJss0MeBxx8FtSCBESnCIiANejrR7fRL6U9NxW2CGOKKK6hY0NI+icKLjOIxwBmv1nMM8d4OZGaBibcG4YERAwot0bNMlEZwRggQt0klWnkphLIpZkU47DlVtRJFkDEmWtZ94Ieo4tM0gwoRRhjgr0s1gVFsSojhCAuEifYUt8ULacbBoS0kkhUIxW1f72o0zsyBGFBSEC4jUOgtn4hFQCEIw44Kv80jHIW0mmGSUCIVLOcNwamqeeYF2I2DRDMdnOphZzbE2kkQxhhiSXLcgL+db6UnIocCIMi6NXcZukkZuEkYwG87qGeXP-ej2o06gHcb6Ga2eB990cOJGizDwJrEtxnkt3RaHBuzY6OM0gB1HFU-vUtN8C7bLKcimCKWUQEoJy8147i7t+DvOWThzIy+ZL7yJyTCJsOOMw6vEUmITUMc59L1llrDUelrYAnPKOUVolYEN24oqiRU3OUV65t4QQcgVJZgTZWBczCMdz0M-b09CgQjlEilazrTW5ZRwThlFmLJypm1YcUoQhURhLsuZ1iEpFJIpRYRh8zAMkij0fR3Fg8C99PW040AHHKZRpINkFOlYJ6f9jtN3o+tx4kb-6feG2p9+Rhx+7ibX59r-DJEDjj+cjr07ox6EGXstMFylDdz41qRDQV9zA+fsfLz0vSTRkck2vidVNdV4hnDAMPUTb+RG7kInOooPQ993l3GO0dqslIQc8FsRqYVUDFLnYL-SQjUB1kdqVAK8wAHHUZguO86xH166fmzHM5h6SRhlOnkbRgvXt8ln4eTacGcxHH84HbmB9i9ul7rj5PwC5IDT4CrsOC-NW+JzJlUHbDb11l3oHIDJtEKxQ-3N9dNcnr1bcOVFcQKWxRicg-3VeMBR6vs2FnUc6oBVet6yDnTk+uuqMWiB02CZJmDmmiHbfkyPewf7exWmqtShOnWmERCmyfNzZ7TkLvR5eGPLVal8Z-rcyqXNfTqZQ-d7wU9bsIeRm724Kuy2MWsgGFUJxnWCCWiBfnS7d6MTB-T1lZv6Sd4q+qWkZ6G6mfMVwEbKRzqa6CCJdxD9EGJNJxbBDsniKqOkzigFoAXMkCIdm9BxL4s9b-ZIn9-opYm4jQI7yQN-byEI-wqSEJi--9hBZlm1HD9Qthd6sayKlogm1ZIqx7TOMQMtkL-87dA2hWtf9g2kH4Z+GHUccQQhhEdHTzTEDi2XoTWZpZy-0yo7rFAhPYu5cTEh2qbnB7aWB5lHN5dN+C0vZbUwQzykEBOCHtLnRqzLW7fGXUtImZ8UikD0GEA1FHUem0FwZJS-xiEzLW-r-95eKin5XGQ1gSqN2TnYt3kH+6PQCxJw5LuzuNdxEM0YqCRCB3xfzQzNDzng1jTYUBbZsqUCe3lPeyv8T5FQNem-eJCVmESrMUmCnhtcH4ZpkHQc4dgnM26zNjDr1uIZd5wWputnYj09j01FdDZMrMMThISKo4bwVHrb2gZq5fMo5gbXcRFpVvP0Hwk0g+-JuY4tR9sjf911VgthgEzAX-V88Jdut9s97abx1740-+z66Ss8uul2u4PDi+-DbsukzU4G4+9fTP7h7AL3z2z+cZ8NXp3afPqWjcSF7GzR4rNgNjsMIDa7Bxlm2iNX4sJi6o6Pr1KLqdu7E69ohvnMJ+IuG1O327-J8rvd7igbk-nJ-s-DjBt4-qN-fnmb8dg9JP2PFtO7nowTmWE6XgrWz-L9c7K0+cP+my-pzS-DXOV5dnSRZpj63Wl0FlhMh4efpmmY8Ty4EZkdfiXPjfOY0tvArNVX7wNo9nJWjVHMi6H1Lj8xC70-4+PLLzndy2U6sNBv3rZGNDeH9+Fklpmr+yFKYCb7Y++cVGVfiU6yGp1UOTqxjeiE2qVn1HHwRqzajFSlOEY7jhdc-bTIVZlLNQQyu3P1y4NY1mvuWAN2h+4ySy7o6FMuwjc30ziz1HD+iVhL9rpn8MIf3XR+qhOVsXXfzEYkV1F-eFeo6HyWTiy2cHQ7LByoNWp9q2GrKErVlua0LCmyISnYphuSopuSevT7rpcmiV0+bVNNg0yyne5n1wmliEFKGKWqbpZiQ9wqpgCwDgywPF+lFK4bynX1bnH5PQ9+599--yOPEOrD9Kb1FP1gKBWHkGNh9rS3YSbNmEl5bwGydUNFwD7+LYta3dm7r1-eWMxvuvPRMHwSZoYQUhQxhYjcjfl8OAa+3SjeyjVDcN1Yjrv76Yp+yXy49f5ubnGf9s7Hr7pPwi0kQhRRqjATu3HbzyobkGF5HSEk5KuGMszvjy8+ZZOMXncyvwty34bdV9etXT6MapNWxH6WJ+5YC+dfApoXwqvMx66CN51UYESY-aKxzQQ2qBedbtENZgJjITiHSPzAmm5Tnvf0wShnUiFMIecNeyCI1WzHd9sO9cy2RoPtxr431VFB-9DuSObsHyGwJV7aby8UUayE4pKpH9nifGBAfZitCnzrdeFfiglfHn+sL68mhO-WE0La3z1rQrzGsdjNsTiivZ0cN05jqpRv03zm-oJJRSSzceRP4nwF8GeQLmqky92kQ0JZY1DaJWyyS9hEISbtBzTEn51kRpDEiknF1T0h4mdKu7YiQGo3y+IIdSHewfIDpE12SpshJjhWinD0LKTvoram4E2zPCPRtYkybtitHntTPZnb-cPKRvVqatzXiZ4kDwzpF17ia3DZ-FLeqPXjnxRKWHMB3HjJZL7aufamumXzgWd2LMumzkpeeAv99O3sjYC07nT3x5nahAfzujEwsrOwjG5wMnomm2yZIj3RGgUEA7Np-mTSG6dO93jVjvjFOcGEECqE2m2VwXv75yjSX1MdTG4N9tVshwjEzJoJKSEe9sngx0GQLSAe8b2jaWDZtrRp8CfsUkssESOMU-VrduObSPvfGGDVyWuzNiwbnJyUnfys5uToz3byHQumAtHZFp8-G-2EcxxVB+AbTsXv9ew2Jlgp8+GFUvbYRVNTv8-WQWlgufD5I4W-Vc+F-JWSKvttL1tof4vqn0Df-8Doqj5dm65i9TwOu2XjeaP8gxy00RG94BpM5m4QaHPAoNEnnzjzqXTxlDcb2d1c1SS1iS1pONiGWTnMDt6DY7d0zO3ZLfX4+dPg-efj0py2fqJri-meM6QaruzhMVaKpgwLJIhCBFLydPtWetlhX1I7fEcaTt9hXrGvCc21CXObKkiZjc3o1xn-vtfn4P3n1Yuk2e6l7OedQ0ulOOOcS3tqd5vBSrJYv-HK2oAMEXOSW2GoynvEyOy7EkKQlHKXUn4cEtkCaWvXVVXVThyShiOHWFRU1ftY15T8r1KSQdgkIZPeqJ0nxv3cCO83yDcXInaYe1t7ZEd70BxWZ1ChJmPWDzs2LKdHYWxP9OTno7aYo4m7-zNVW+uqjTw+3gdrhDR+zq9gKH3Ol+W5ZxM9tYUIEXV6jrzA9R-BTbnen0JMGcCPsCJqSfHBi-3uJPG+6YyWgqRyWuZ2f-OTfxmv0dHfZsm-Pmrge3GiAz01p1KTuQb93u8txCFwg6l5DsCNBldhNAsT4F6GaQK8xOZN3IUG6RLceMk8r2iuGADEYdt0sjTt295mkdZB8XRp-tHTcQLC4J-gPJxcg2h+m8wXINYTc1rzNehH6SJ+DXpuHL8Gx6mXuFHsNI0oo9b2ASY2CPGutMdOTSdrPM6eueyV3yQ4+zA82B+HaTTRxe7bPIySCx0tLNc237zdIz1NLaILkEe4I-uD9l2fnVHxw3Qa6DhuLLI3LEwz7N8G7sKbxAWI+9vfq9Z5sV9Em+KLUu12WpacDeowjZNw4YBumoT5Vm2h8cqNlzNv4SVn+pv2bXTOC9dvKZWuG62bX52MstIlmDNBzC0lLhxwEaX6xGYh52A-q5FB3FgYTezFHsoxZkIJaC7GbSxyssmn6dYcBro1N8m45JwhzhFTu1ZGWWGlBOPK3NUhltgGIFlSQVMFHGxLiamUUgmJ1X3gUFspLBGUmGN8Hzizi4MZochc7BNKlPBtgtlb2f7gxf4o0svilAqyG7eHZt928LW0DD3YL6Uf7B9H7nJ+sL+0WMo3hhKL-8SbzUduHDvgdzMCAhHESilmrhr90XFaCLUVERITSagdVNbQVzsCCRHBRUtn4c14rv2rvCWuFIMKUmtV0xJtQ6UEFRKxbLilloiEmElbE7fN+Q0CGReGcouhTRARSEAEBa-U5IgzcxNrPZo1CNIWkFJKEJQKZU0ZTXAOCUOKy0pTFEFhvmAQyHEORRi0CDNI0LpwncSz8GbFIW3gELeVcTtMZWbn3CbdSLuxeXvYK5Xn4U28WtSXLbi3YfWDF-sXkRvEV+aNZmLIaYDA4O1vo-PBeHBhTpXt1Yo0FChUhfcqssL16qcBrjewWaShwOoiaylmVa7HPjRqVa-dVeJWcZ+04TrpKqRVblCu7kHWr0HeF9fOh+Nsj6chmpTDmlAQmTBK7R263aEDt5mCXHIoFKL37uW2FRZUUIgQ4tvi2ipskIp9ya8IG+YuAuGYUSYY4s2uYx0MMYkElgzLLQ5mPVNwiM13TVuFQ2TuQnOISd4Xh4xBKLmi27sibYgYQUxApVjd8c1rRTJ7MOsZHd8cdiGUC4Ipyd5XT3F9UvO604DU-W6zSEOBQhm06vq0Xv00oPUGNos0FBh8BYVAMqmfjICdb2R0ZWlnNq2itGLm07Yy7jjjr6kb6anTzL0N9SfvchHKEv17P9SgNTl5WvUn9U6e0HvlzZfTQaqANpRnngdfzcohcP3bOx2Bj14wDW9ya7lBYJY7kb7y-ERHXjAzIamQCVx3n0m2aOTgxf5e7T9WiA9e-D-vIihv